645612123502 has 8 divisors (see below), whose sum is σ = 969997988376. Its totient is φ = 322279460712.

The previous prime is 645612123487. The next prime is 645612123511. The reversal of 645612123502 is 205321216546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263298988 + ... + 263301439.

It is an arithmetic number, because the mean of its divisors is an integer number (121249748547).

Almost surely, 2^645612123502 is an apocalyptic number.

645612123502 is a deficient number, since it is larger than the sum of its proper divisors (324385864874).

645612123502 is a wasteful number, since it uses less digits than its factorization.

645612123502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526601042.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 645612123502 in words is "six hundred forty-five billion, six hundred twelve million, one hundred twenty-three thousand, five hundred two".