123372123657 has 8 divisors (see below), whose sum is σ = 164547727680. Its totient is φ = 82222301040.

The previous prime is 123372123509. The next prime is 123372123661. The reversal of 123372123657 is 756321273321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123372123657 - 2²² = 123367929353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123372121657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6434182 + ... + 6453327.

It is an arithmetic number, because the mean of its divisors is an integer number (20568465960).

Almost surely, 2^123372123657 is an apocalyptic number.

It is an amenable number.

123372123657 is a deficient number, since it is larger than the sum of its proper divisors (41175604023).

123372123657 is a wasteful number, since it uses less digits than its factorization.

123372123657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12890703.

The product of its digits is 317520, while the sum is 42.

Adding to 123372123657 its reverse (756321273321), we get a palindrome (879693396978).

The spelling of 123372123657 in words is "one hundred twenty-three billion, three hundred seventy-two million, one hundred twenty-three thousand, six hundred fifty-seven".