401811813936 has 120 divisors (see below), whose sum is σ = 1225607191536. Its totient is φ = 122144785920.

The previous prime is 401811813911. The next prime is 401811813967. The reversal of 401811813936 is 639318118104.

401811813936 is a `hidden beast` number, since 4 + 0 + 1 + 81 + 181 + 393 + 6 = 666.

It is a super-2 number, since 2×401811813936² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401811813891 and 401811813900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1137655 + ... + 1448406.

Almost surely, 2^401811813936 is an apocalyptic number.

It is an amenable number.

401811813936 is an abundant number, since it is smaller than the sum of its proper divisors (823795377600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401811813936 is a wasteful number, since it uses less digits than its factorization.

401811813936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586171 (or 2586162 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 401811813936 in words is "four hundred one billion, eight hundred eleven million, eight hundred thirteen thousand, nine hundred thirty-six".