640634303415 has 16 divisors (see below), whose sum is σ = 1027918618848. Its totient is φ = 340703717376.

The previous prime is 640634303401. The next prime is 640634303443. The reversal of 640634303415 is 514303436046.

It is not a de Polignac number, because 640634303415 - 2⁴ = 640634303399 is a prime.

It is a super-3 number, since 3×640634303415³ (a number of 36 digits) contains 333 as substring.

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, 60488974 + ... + 60499563.

It is an arithmetic number, because the mean of its divisors is an integer number (64244913678).

Almost surely, 2^640634303415 is an apocalyptic number.

640634303415 is a deficient number, since it is larger than the sum of its proper divisors (387284315433).

640634303415 is a wasteful number, since it uses less digits than its factorization.

640634303415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120988898.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 640634303415 in words is "six hundred forty billion, six hundred thirty-four million, three hundred three thousand, four hundred fifteen".