431661042136401 has 32 divisors (see below), whose sum is σ = 718153134594048. Its totient is φ = 224056150256640.

The previous prime is 431661042136393. The next prime is 431661042136403. The reversal of 431661042136401 is 104631240166134.

It is not a de Polignac number, because 431661042136401 - 2³ = 431661042136393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (431661042136403) 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, 763684176 + ... + 764249201.

It is an arithmetic number, because the mean of its divisors is an integer number (22442285456064).

Almost surely, 2^{431661042136401} is an apocalyptic number.

It is an amenable number.

431661042136401 is a deficient number, since it is larger than the sum of its proper divisors (286492092457647).

431661042136401 is a wasteful number, since it uses less digits than its factorization.

431661042136401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527934621.

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 431661042136401 in words is "four hundred thirty-one trillion, six hundred sixty-one billion, forty-two million, one hundred thirty-six thousand, four hundred one".