645276675 has 12 divisors (see below), whose sum is σ = 1066857560. Its totient is φ = 344147520.

The previous prime is 645276673. The next prime is 645276691. The reversal of 645276675 is 576672546.

It is not a de Polignac number, because 645276675 - 2¹ = 645276673 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (645276673) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4301770 + ... + 4301919.

Almost surely, 2^645276675 is an apocalyptic number.

645276675 is a deficient number, since it is larger than the sum of its proper divisors (421580885).

645276675 is a wasteful number, since it uses less digits than its factorization.

645276675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8603702 (or 8603697 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 48.

The square root of 645276675 is about 25402.2966481379. The cubic root of 645276675 is about 864.1357824686.

The spelling of 645276675 in words is "six hundred forty-five million, two hundred seventy-six thousand, six hundred seventy-five".