401981312236 has 12 divisors (see below), whose sum is σ = 803962624528. Its totient is φ = 172277705232.

The previous prime is 401981312207. The next prime is 401981312251. The reversal of 401981312236 is 632213189104.

It is a happy number.

401981312236 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7178237691 + ... + 7178237746.

Almost surely, 2^401981312236 is an apocalyptic number.

It is an amenable number.

401981312236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401981312236 is a wasteful number, since it uses less digits than its factorization.

401981312236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14356475448 (or 14356475446 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 401981312236 in words is "four hundred one billion, nine hundred eighty-one million, three hundred twelve thousand, two hundred thirty-six".