115866627709638 has 32 divisors (see below), whose sum is σ = 249619360951296. Its totient is φ = 35642631421728.

The previous prime is 115866627709621. The next prime is 115866627709649. The reversal of 115866627709638 is 836907726668511.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115866627709638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179647756 + ... + 180291567.

It is an arithmetic number, because the mean of its divisors is an integer number (7800605029728).

Almost surely, 2^{115866627709638} is an apocalyptic number.

115866627709638 is an abundant number, since it is smaller than the sum of its proper divisors (133752733241658).

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

115866627709638 is a wasteful number, since it uses less digits than its factorization.

115866627709638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359943468.

The product of its (nonzero) digits is 1097349120, while the sum is 75.

The spelling of 115866627709638 in words is "one hundred fifteen trillion, eight hundred sixty-six billion, six hundred twenty-seven million, seven hundred nine thousand, six hundred thirty-eight".