123661025442170 has 16 divisors (see below), whose sum is σ = 222628780627848. Its totient is φ = 49455757992000.

The previous prime is 123661025442167. The next prime is 123661025442197. The reversal of 123661025442170 is 71244520166321.

It can be written as a sum of positive squares in 4 ways, for example, as 100251017326849 + 23410008115321 = 10012543^2 + 4838389^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1081463081 + ... + 1081577420.

Almost surely, 2^{123661025442170} is an apocalyptic number.

123661025442170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123661025442170 is a deficient number, since it is larger than the sum of its proper divisors (98967755185678).

123661025442170 is a wasteful number, since it uses less digits than its factorization.

123661025442170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163046225.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 123661025442170 in words is "one hundred twenty-three trillion, six hundred sixty-one billion, twenty-five million, four hundred forty-two thousand, one hundred seventy".