401531375976 has 32 divisors (see below), whose sum is σ = 1047473156160. Its totient is φ = 128024496512.

The previous prime is 401531375893. The next prime is 401531375989. The reversal of 401531375976 is 679573135104.

It is a happy number.

It is a super-2 number, since 2×401531375976² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 363705405 + ... + 363706508.

It is an arithmetic number, because the mean of its divisors is an integer number (32733536130).

Almost surely, 2^401531375976 is an apocalyptic number.

401531375976 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

401531375976 is an abundant number, since it is smaller than the sum of its proper divisors (645941780184).

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

401531375976 is a wasteful number, since it uses less digits than its factorization.

401531375976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727411945 (or 727411941 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 51.

The spelling of 401531375976 in words is "four hundred one billion, five hundred thirty-one million, three hundred seventy-five thousand, nine hundred seventy-six".