102655623688 has 8 divisors (see below), whose sum is σ = 192479294430. Its totient is φ = 51327811840.

The previous prime is 102655623677. The next prime is 102655623689. The reversal of 102655623688 is 886326556201.

It can be written as a sum of positive squares in only one way, i.e., 94545180324 + 8110443364 = 307482^2 + 90058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 6415976473 + ... + 6415976488.

Almost surely, 2^102655623688 is an apocalyptic number.

It is an amenable number.

102655623688 is a deficient number, since it is larger than the sum of its proper divisors (89823670742).

102655623688 is a wasteful number, since it uses less digits than its factorization.

102655623688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12831952967 (or 12831952963 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 102655623688 in words is "one hundred two billion, six hundred fifty-five million, six hundred twenty-three thousand, six hundred eighty-eight".