4565540640 has 48 divisors (see below), whose sum is σ = 14381454528. Its totient is φ = 1217477376.

The previous prime is 4565540633. The next prime is 4565540659. The reversal of 4565540640 is 460455654.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×4565540640² = 41688322670983219200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4755292 + ... + 4756251.

It is an arithmetic number, because the mean of its divisors is an integer number (299613636).

Almost surely, 2^4565540640 is an apocalyptic number.

4565540640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4565540640 is an abundant number, since it is smaller than the sum of its proper divisors (9815913888).

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

4565540640 is a wasteful number, since it uses less digits than its factorization.

4565540640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511561 (or 9511553 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The square root of 4565540640 is about 67568.7845088248. The cubic root of 4565540640 is about 1658.9402245164.

The spelling of 4565540640 in words is "four billion, five hundred sixty-five million, five hundred forty thousand, six hundred forty".