1878947338009 has 27 divisors (see below), whose sum is σ = 2224058251797. Its totient is φ = 1582752214008.

The previous prime is 1878947337989. The next prime is 1878947338013. The reversal of 1878947338009 is 9008337498781.

It is a happy number.

The square root of 1878947338009 is 1370747.

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

It is not a de Polignac number, because 1878947338009 - 2¹³ = 1878947329817 is a prime.

It is a super-2 number, since 2×1878947338009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1878947338049) 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, 566116852 + ... + 566120170.

Almost surely, 2^{1878947338009} is an apocalyptic number.

1878947338009 is the 1370747-th square number.

1878947338009 is the 685374-th centered octagonal number.

It is an amenable number.

1878947338009 is a deficient number, since it is larger than the sum of its proper divisors (345110913788).

1878947338009 is an frugal number, since it uses more digits than its factorization.

1878947338009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6770 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 67.

The spelling of 1878947338009 in words is "one trillion, eight hundred seventy-eight billion, nine hundred forty-seven million, three hundred thirty-eight thousand, nine".