4000898961 has 16 divisors (see below), whose sum is σ = 5985947520. Its totient is φ = 2640855600.

The previous prime is 4000898933. The next prime is 4000898971. The reversal of 4000898961 is 1698980004.

It is not a de Polignac number, because 4000898961 - 2⁵ = 4000898929 is a prime.

It is a super-2 number, since 2×4000898961² = 32014384992261759042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4000898971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730845 + ... + 736298.

It is an arithmetic number, because the mean of its divisors is an integer number (374121720).

Almost surely, 2^4000898961 is an apocalyptic number.

It is an amenable number.

4000898961 is a deficient number, since it is larger than the sum of its proper divisors (1985048559).

4000898961 is a wasteful number, since it uses less digits than its factorization.

4000898961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467253 (or 1467247 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 4000898961 is about 63252.6597148294. The cubic root of 4000898961 is about 1587.5199606972.

The spelling of 4000898961 in words is "four billion, eight hundred ninety-eight thousand, nine hundred sixty-one".