523955561901 has 32 divisors (see below), whose sum is σ = 736141633920. Its totient is φ = 331008787200.

The previous prime is 523955561893. The next prime is 523955561911. The reversal of 523955561901 is 109165559325.

It is a happy number.

It is not a de Polignac number, because 523955561901 - 2³ = 523955561893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523955561911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2339446 + ... + 2553608.

It is an arithmetic number, because the mean of its divisors is an integer number (23004426060).

Almost surely, 2^523955561901 is an apocalyptic number.

It is an amenable number.

523955561901 is a deficient number, since it is larger than the sum of its proper divisors (212186072019).

523955561901 is a wasteful number, since it uses less digits than its factorization.

523955561901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214717.

The product of its (nonzero) digits is 1822500, while the sum is 51.

The spelling of 523955561901 in words is "five hundred twenty-three billion, nine hundred fifty-five million, five hundred sixty-one thousand, nine hundred one".