102655623687 has 4 divisors (see below), whose sum is σ = 136874164920. Its totient is φ = 68437082456.

The previous prime is 102655623677. The next prime is 102655623689. The reversal of 102655623687 is 786326556201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102655623687 - 2⁷ = 102655623559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102655623689) 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, 17109270612 + ... + 17109270617.

It is an arithmetic number, because the mean of its divisors is an integer number (34218541230).

Almost surely, 2^102655623687 is an apocalyptic number.

102655623687 is a deficient number, since it is larger than the sum of its proper divisors (34218541233).

102655623687 is an equidigital number, since it uses as much as digits as its factorization.

102655623687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34218541232.

The product of its (nonzero) digits is 3628800, while the sum is 51.

The spelling of 102655623687 in words is "one hundred two billion, six hundred fifty-five million, six hundred twenty-three thousand, six hundred eighty-seven".