640105514004 has 48 divisors (see below), whose sum is σ = 1633975358400. Its totient is φ = 193421859840.

The previous prime is 640105513981. The next prime is 640105514117. The reversal of 640105514004 is 400415501046.

It is a super-2 number, since 2×640105514004² (a number of 24 digits) contains 22 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, 6822079 + ... + 6915270.

It is an arithmetic number, because the mean of its divisors is an integer number (34041153300).

Almost surely, 2^640105514004 is an apocalyptic number.

It is an amenable number.

640105514004 is an abundant number, since it is smaller than the sum of its proper divisors (993869844396).

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

640105514004 is a wasteful number, since it uses less digits than its factorization.

640105514004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13737720 (or 13737718 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 640105514004 in words is "six hundred forty billion, one hundred five million, five hundred fourteen thousand, four".