401618651 has 24 divisors (see below), whose sum is σ = 487062720. Its totient is φ = 329788032.

The previous prime is 401618647. The next prime is 401618669. The reversal of 401618651 is 156816104.

It is not a de Polignac number, because 401618651 - 2² = 401618647 is a prime.

It is a super-2 number, since 2×401618651² = 322595081662119602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401618681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193646 + ... + 195708.

It is an arithmetic number, because the mean of its divisors is an integer number (20294280).

Almost surely, 2^401618651 is an apocalyptic number.

401618651 is a deficient number, since it is larger than the sum of its proper divisors (85444069).

401618651 is a wasteful number, since it uses less digits than its factorization.

401618651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 401618651 is about 20040.4254196362. The cubic root of 401618651 is about 737.7988223513.

The spelling of 401618651 in words is "four hundred one million, six hundred eighteen thousand, six hundred fifty-one".