401816785808 has 10 divisors (see below), whose sum is σ = 778520022534. Its totient is φ = 200908392896.

The previous prime is 401816785771. The next prime is 401816785819. The reversal of 401816785808 is 808587618104.

It can be written as a sum of positive squares in only one way, i.e., 387366822544 + 14449963264 = 622388^2 + 120208^2 .

It is a super-2 number, since 2×401816785808² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12556774541 + ... + 12556774572.

Almost surely, 2^401816785808 is an apocalyptic number.

It is an amenable number.

401816785808 is a deficient number, since it is larger than the sum of its proper divisors (376703236726).

401816785808 is a wasteful number, since it uses less digits than its factorization.

401816785808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25113549121 (or 25113549115 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 56.

The spelling of 401816785808 in words is "four hundred one billion, eight hundred sixteen million, seven hundred eighty-five thousand, eight hundred eight".