237166078009 has 27 divisors (see below), whose sum is σ = 285847616847. Its totient is φ = 196193559408.

The previous prime is 237166077989. The next prime is 237166078027. The reversal of 237166078009 is 900870661732.

It is a happy number.

The square root of 237166078009 is 486997.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 124364138409 + 112801939600 = 352653^2 + 335860^2 .

It is not a de Polignac number, because 237166078009 - 2¹⁵ = 237166045241 is a prime.

It is a super-4 number, since 4×237166078009⁴ (a number of 47 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (237166078609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 98859192 + ... + 98861590.

Almost surely, 2^237166078009 is an apocalyptic number.

237166078009 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

237166078009 is the 486997-th square number.

237166078009 is the 243499-th centered octagonal number.

It is an amenable number.

237166078009 is a deficient number, since it is larger than the sum of its proper divisors (48681538838).

237166078009 is an frugal number, since it uses more digits than its factorization.

237166078009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 49.

Multiplying 237166078009 by its sum of digits (49), we get a square (11621137822441 = 3408979²).

237166078009 divided by its sum of digits (49) gives a square (4840124041 = 69571²).

The spelling of 237166078009 in words is "two hundred thirty-seven billion, one hundred sixty-six million, seventy-eight thousand, nine".