401651653 has 12 divisors (see below), whose sum is σ = 449927460. Its totient is φ = 357966336.

The previous prime is 401651651. The next prime is 401651671. The reversal of 401651653 is 356156104.

It can be written as a sum of positive squares in 6 ways, for example, as 95296644 + 306355009 = 9762^2 + 17503^2 .

It is not a de Polignac number, because 401651653 - 2¹ = 401651651 is a prime.

It is a super-2 number, since 2×401651653² = 322648100715264818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401651651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36076 + ... + 45877.

It is an arithmetic number, because the mean of its divisors is an integer number (37493955).

Almost surely, 2^401651653 is an apocalyptic number.

It is an amenable number.

401651653 is a deficient number, since it is larger than the sum of its proper divisors (48275807).

401651653 is a wasteful number, since it uses less digits than its factorization.

401651653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82008 (or 81995 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 401651653 is about 20041.2487884363. The cubic root of 401651653 is about 737.8190307171.

The spelling of 401651653 in words is "four hundred one million, six hundred fifty-one thousand, six hundred fifty-three".