640480528714 has 8 divisors (see below), whose sum is σ = 1034622392580. Its totient is φ = 295606397856.

The previous prime is 640480528687. The next prime is 640480528763. The reversal of 640480528714 is 417825084046.

It is a happy number.

640480528714 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 630250217689 + 10230311025 = 793883^2 + 101145^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12316933219 + ... + 12316933270.

Almost surely, 2^640480528714 is an apocalyptic number.

640480528714 is a deficient number, since it is larger than the sum of its proper divisors (394141863866).

640480528714 is a wasteful number, since it uses less digits than its factorization.

640480528714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24633866504.

The product of its (nonzero) digits is 1720320, while the sum is 49.

The spelling of 640480528714 in words is "six hundred forty billion, four hundred eighty million, five hundred twenty-eight thousand, seven hundred fourteen".