261126207318 has 8 divisors (see below), whose sum is σ = 522252414648. Its totient is φ = 87042069104.

The previous prime is 261126207313. The next prime is 261126207341. The reversal of 261126207318 is 813702621162.

It is a sphenic number, since it is the product of 3 distinct primes.

261126207318 is an admirable number.

It is a super-2 number, since 2×261126207318² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261126207311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21760517271 + ... + 21760517282.

It is an arithmetic number, because the mean of its divisors is an integer number (65281551831).

Almost surely, 2^261126207318 is an apocalyptic number.

261126207318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261126207318 is a wasteful number, since it uses less digits than its factorization.

261126207318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43521034558.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 261126207318 in words is "two hundred sixty-one billion, one hundred twenty-six million, two hundred seven thousand, three hundred eighteen".