123251665263727 has 48 divisors (see below), whose sum is σ = 169985158912800. Its totient is φ = 87839219784960.

The previous prime is 123251665263709. The next prime is 123251665263731. The reversal of 123251665263727 is 727362566152321.

It is not a de Polignac number, because 123251665263727 - 2²⁷ = 123251531045999 is a prime.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123251665261727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79923352 + ... + 81450877.

It is an arithmetic number, because the mean of its divisors is an integer number (3541357477350).

Almost surely, 2^{123251665263727} is an apocalyptic number.

123251665263727 is a deficient number, since it is larger than the sum of its proper divisors (46733493649073).

123251665263727 is a wasteful number, since it uses less digits than its factorization.

123251665263727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161374376 (or 161374369 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 58.

The spelling of 123251665263727 in words is "one hundred twenty-three trillion, two hundred fifty-one billion, six hundred sixty-five million, two hundred sixty-three thousand, seven hundred twenty-seven".