12938685537 has 8 divisors (see below), whose sum is σ = 17269242336. Its totient is φ = 8616959552.

The previous prime is 12938685527. The next prime is 12938685541. The reversal of 12938685537 is 73558683921.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12938685537 - 2²² = 12934491233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12938685527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2204283 + ... + 2210144.

It is an arithmetic number, because the mean of its divisors is an integer number (2158655292).

Almost surely, 2^12938685537 is an apocalyptic number.

It is an amenable number.

12938685537 is a deficient number, since it is larger than the sum of its proper divisors (4330556799).

12938685537 is an equidigital number, since it uses as much as digits as its factorization.

12938685537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415407.

The product of its digits is 10886400, while the sum is 57.

The spelling of 12938685537 in words is "twelve billion, nine hundred thirty-eight million, six hundred eighty-five thousand, five hundred thirty-seven".