640100365 has 16 divisors (see below), whose sum is σ = 792969408. Its totient is φ = 495726336.

The previous prime is 640100359. The next prime is 640100387. The reversal of 640100365 is 563001046.

It is a cyclic number.

It is not a de Polignac number, because 640100365 - 2¹¹ = 640098317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11122 + ... + 37468.

It is an arithmetic number, because the mean of its divisors is an integer number (49560588).

Almost surely, 2^640100365 is an apocalyptic number.

It is an amenable number.

640100365 is a deficient number, since it is larger than the sum of its proper divisors (152869043).

640100365 is a wasteful number, since it uses less digits than its factorization.

640100365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26508.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 640100365 is about 25300.2048410680. The cubic root of 640100365 is about 861.8189215410.

The spelling of 640100365 in words is "six hundred forty million, one hundred thousand, three hundred sixty-five".