645051750475 has 24 divisors (see below), whose sum is σ = 874463887872. Its totient is φ = 468115216800.

The previous prime is 645051750439. The next prime is 645051750479. The reversal of 645051750475 is 574057150546.

It is a de Polignac number, because none of the positive numbers 2^k-645051750475 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645051750479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2405767 + ... + 2660416.

It is an arithmetic number, because the mean of its divisors is an integer number (36435995328).

Almost surely, 2^645051750475 is an apocalyptic number.

645051750475 is a deficient number, since it is larger than the sum of its proper divisors (229412137397).

645051750475 is a wasteful number, since it uses less digits than its factorization.

645051750475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5066667 (or 5066662 counting only the distinct ones).

The product of its (nonzero) digits is 2940000, while the sum is 49.

The spelling of 645051750475 in words is "six hundred forty-five billion, fifty-one million, seven hundred fifty thousand, four hundred seventy-five".