123520522403901 has 16 divisors (see below), whose sum is σ = 194293417730048. Its totient is φ = 68306279670000.

The previous prime is 123520522403897. The next prime is 123520522403959. The reversal of 123520522403901 is 109304225025321.

It is not a de Polignac number, because 123520522403901 - 2² = 123520522403897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123520522403901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123520522403501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94869832225 + ... + 94869833526.

It is an arithmetic number, because the mean of its divisors is an integer number (12143338608128).

Almost surely, 2^{123520522403901} is an apocalyptic number.

It is an amenable number.

123520522403901 is a deficient number, since it is larger than the sum of its proper divisors (70772895326147).

123520522403901 is a wasteful number, since it uses less digits than its factorization.

123520522403901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189739665792.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 123520522403901 in words is "one hundred twenty-three trillion, five hundred twenty billion, five hundred twenty-two million, four hundred three thousand, nine hundred one".