125643656661102 has 32 divisors (see below), whose sum is σ = 295632133322400. Its totient is φ = 39417617775744.

The previous prime is 125643656661101. The next prime is 125643656661197. The reversal of 125643656661102 is 201166656346521.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125643656661101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68433363277 + ... + 68433365112.

It is an arithmetic number, because the mean of its divisors is an integer number (9238504166325).

Almost surely, 2^{125643656661102} is an apocalyptic number.

125643656661102 is an abundant number, since it is smaller than the sum of its proper divisors (169988476661298).

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

125643656661102 is a wasteful number, since it uses less digits than its factorization.

125643656661102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136866728417 (or 136866728411 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 125643656661102 in words is "one hundred twenty-five trillion, six hundred forty-three billion, six hundred fifty-six million, six hundred sixty-one thousand, one hundred two".