640152858567 has 4 divisors (see below), whose sum is σ = 853537144760. Its totient is φ = 426768572376.

The previous prime is 640152858557. The next prime is 640152858571. The reversal of 640152858567 is 765858251046.

640152858567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 640152858567 - 2²² = 640148664263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640152858557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106692143092 + ... + 106692143097.

It is an arithmetic number, because the mean of its divisors is an integer number (213384286190).

Almost surely, 2^640152858567 is an apocalyptic number.

640152858567 is a deficient number, since it is larger than the sum of its proper divisors (213384286193).

640152858567 is a wasteful number, since it uses less digits than its factorization.

640152858567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213384286192.

The product of its (nonzero) digits is 16128000, while the sum is 57.

The spelling of 640152858567 in words is "six hundred forty billion, one hundred fifty-two million, eight hundred fifty-eight thousand, five hundred sixty-seven".