645374437330 has 32 divisors (see below), whose sum is σ = 1328706086400. Its totient is φ = 221091456960.

The previous prime is 645374437303. The next prime is 645374437403. The reversal of 645374437330 is 33734473546.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3658605 + ... + 3830944.

It is an arithmetic number, because the mean of its divisors is an integer number (41522065200).

Almost surely, 2^645374437330 is an apocalyptic number.

645374437330 is an abundant number, since it is smaller than the sum of its proper divisors (683331649070).

645374437330 is a wasteful number, since it uses less digits than its factorization.

645374437330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490794.

The product of its (nonzero) digits is 7620480, while the sum is 49.

The spelling of 645374437330 in words is "six hundred forty-five billion, three hundred seventy-four million, four hundred thirty-seven thousand, three hundred thirty".