690940975050 has 72 divisors (see below), whose sum is σ = 1916209676160. Its totient is φ = 178307344800.

The previous prime is 690940975033. The next prime is 690940975061. The reversal of 690940975050 is 50579049096.

690940975050 is a `hidden beast` number, since 6 + 9 + 0 + 9 + 40 + 97 + 505 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24750960 + ... + 24778859.

It is an arithmetic number, because the mean of its divisors is an integer number (26614023280).

Almost surely, 2^690940975050 is an apocalyptic number.

690940975050 is an abundant number, since it is smaller than the sum of its proper divisors (1225268701110).

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

690940975050 is a wasteful number, since it uses less digits than its factorization.

690940975050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49529868 (or 49529860 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 690940975050 in words is "six hundred ninety billion, nine hundred forty million, nine hundred seventy-five thousand, fifty".