645137504762 has 16 divisors (see below), whose sum is σ = 1025915806440. Its totient is φ = 303213186048.

The previous prime is 645137504723. The next prime is 645137504773. The reversal of 645137504762 is 267405731546.

645137504762 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 4 ways, for example, as 560235783121 + 84901721641 = 748489^2 + 291379^2 .

It is a super-3 number, since 3×645137504762³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645137504762.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11876687 + ... + 11930882.

Almost surely, 2^645137504762 is an apocalyptic number.

645137504762 is a deficient number, since it is larger than the sum of its proper divisors (380778301678).

645137504762 is a wasteful number, since it uses less digits than its factorization.

645137504762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808385.

The product of its (nonzero) digits is 4233600, while the sum is 50.

The spelling of 645137504762 in words is "six hundred forty-five billion, one hundred thirty-seven million, five hundred four thousand, seven hundred sixty-two".