400519373956 has 81 divisors (see below), whose sum is σ = 769755294189. Its totient is φ = 182265408000.

The previous prime is 400519373951. The next prime is 400519373983. The reversal of 400519373956 is 659373915004.

The square root of 400519373956 is 632866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 41018400900 + 359500973056 = 202530^2 + 599584^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400519373951) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1661905996 + ... + 1661906236.

Almost surely, 2^400519373956 is an apocalyptic number.

400519373956 is the 632866-th square number.

It is an amenable number.

400519373956 is a deficient number, since it is larger than the sum of its proper divisors (369235920233).

400519373956 is a wasteful number, since it uses less digits than its factorization.

400519373956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 400519373956 in words is "four hundred billion, five hundred nineteen million, three hundred seventy-three thousand, nine hundred fifty-six".