645305527523140 has 48 divisors (see below), whose sum is σ = 1491899017815360. Its totient is φ = 232503743018880.

The previous prime is 645305527523131. The next prime is 645305527523201. The reversal of 645305527523140 is 41325725503546.

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, 13455053742 + ... + 13455101701.

It is an arithmetic number, because the mean of its divisors is an integer number (31081229537820).

Almost surely, 2^{645305527523140} is an apocalyptic number.

It is an amenable number.

645305527523140 is an abundant number, since it is smaller than the sum of its proper divisors (846593490292220).

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

645305527523140 is a wasteful number, since it uses less digits than its factorization.

645305527523140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26910155572 (or 26910155570 counting only the distinct ones).

The product of its (nonzero) digits is 15120000, while the sum is 52.

The spelling of 645305527523140 in words is "six hundred forty-five trillion, three hundred five billion, five hundred twenty-seven million, five hundred twenty-three thousand, one hundred forty".