645041274234 has 16 divisors (see below), whose sum is σ = 1474380055488. Its totient is φ = 184297506912.

The previous prime is 645041274223. The next prime is 645041274277. The reversal of 645041274234 is 432472140546.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 15358125577 = 645041274234 / (6 + 4 + 5 + 0 + 4 + 1 + 2 + 7 + 4 + 2 + 3 + 4).

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, 7679062747 + ... + 7679062830.

It is an arithmetic number, because the mean of its divisors is an integer number (92148753468).

Almost surely, 2^645041274234 is an apocalyptic number.

645041274234 is an abundant number, since it is smaller than the sum of its proper divisors (829338781254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645041274234 is a wasteful number, since it uses less digits than its factorization.

645041274234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15358125589.

The product of its (nonzero) digits is 645120, while the sum is 42.

The spelling of 645041274234 in words is "six hundred forty-five billion, forty-one million, two hundred seventy-four thousand, two hundred thirty-four".