4001640560 has 20 divisors (see below), whose sum is σ = 9303814488. Its totient is φ = 1600656192.

The previous prime is 4001640553. The next prime is 4001640623. The reversal of 4001640560 is 650461004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×4001640560² = 32026254342874227200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25010174 + ... + 25010333.

Almost surely, 2^4001640560 is an apocalyptic number.

4001640560 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4001640560 is an abundant number, since it is smaller than the sum of its proper divisors (5302173928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4001640560 is a wasteful number, since it uses less digits than its factorization.

4001640560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50020520 (or 50020514 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 4001640560 is about 63258.5216393807. The cubic root of 4001640560 is about 1587.6180411947.

The spelling of 4001640560 in words is "four billion, one million, six hundred forty thousand, five hundred sixty".