401551264 has 12 divisors (see below), whose sum is σ = 790554114. Its totient is φ = 200775616.

The previous prime is 401551223. The next prime is 401551279. The reversal of 401551264 is 462155104.

It can be written as a sum of positive squares in only one way, i.e., 361760400 + 39790864 = 19020^2 + 6308^2 .

It is a super-2 number, since 2×401551264² = 322486835239995392, which 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, 6274207 + ... + 6274270.

Almost surely, 2^401551264 is an apocalyptic number.

It is an amenable number.

401551264 is a deficient number, since it is larger than the sum of its proper divisors (389002850).

401551264 is a wasteful number, since it uses less digits than its factorization.

401551264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12548487 (or 12548479 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 401551264 is about 20038.7440724213. The cubic root of 401551264 is about 737.7575553185.

The spelling of 401551264 in words is "four hundred one million, five hundred fifty-one thousand, two hundred sixty-four".