640153535260245 has 16 divisors (see below), whose sum is σ = 1025949892132032. Its totient is φ = 340847140233600.

The previous prime is 640153535260229. The next prime is 640153535260247. The reversal of 640153535260245 is 542062535351046.

It is not a de Polignac number, because 640153535260245 - 2⁴ = 640153535260229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640153535260247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35504901427 + ... + 35504919456.

It is an arithmetic number, because the mean of its divisors is an integer number (64121868258252).

Almost surely, 2^{640153535260245} is an apocalyptic number.

It is an amenable number.

640153535260245 is a deficient number, since it is larger than the sum of its proper divisors (385796356871787).

640153535260245 is a wasteful number, since it uses less digits than its factorization.

640153535260245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71009821492.

The product of its (nonzero) digits is 12960000, while the sum is 51.

The spelling of 640153535260245 in words is "six hundred forty trillion, one hundred fifty-three billion, five hundred thirty-five million, two hundred sixty thousand, two hundred forty-five".