401813766840 has 64 divisors (see below), whose sum is σ = 1205538890400. Its totient is φ = 107141663232.

The previous prime is 401813766839. The next prime is 401813766863. The reversal of 401813766840 is 48667318104.

It is a super-2 number, since 2×401813766840² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401813766840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1427706 + ... + 1685814.

Almost surely, 2^401813766840 is an apocalyptic number.

401813766840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401813766840 is an abundant number, since it is smaller than the sum of its proper divisors (803725123560).

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

401813766840 is a wasteful number, since it uses less digits than its factorization.

401813766840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271096 (or 271092 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 401813766840 in words is "four hundred one billion, eight hundred thirteen million, seven hundred sixty-six thousand, eight hundred forty".