640152454515 has 64 divisors (see below), whose sum is σ = 1173283937280. Its totient is φ = 291961958400.

The previous prime is 640152454489. The next prime is 640152454517. The reversal of 640152454515 is 515454251046.

It is a happy number.

It is not a de Polignac number, because 640152454515 - 2⁶ = 640152454451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640152454517) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 147600427 + ... + 147604763.

It is an arithmetic number, because the mean of its divisors is an integer number (18332561520).

Almost surely, 2^640152454515 is an apocalyptic number.

640152454515 is a deficient number, since it is larger than the sum of its proper divisors (533131482765).

640152454515 is a wasteful number, since it uses less digits than its factorization.

640152454515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7292.

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 640152454515 in words is "six hundred forty billion, one hundred fifty-two million, four hundred fifty-four thousand, five hundred fifteen".