690693781600 has 72 divisors (see below), whose sum is σ = 1688242023720. Its totient is φ = 275935749120.

The previous prime is 690693781487. The next prime is 690693781633. The reversal of 690693781600 is 6187396096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113599 + ... + 1180801.

It is an arithmetic number, because the mean of its divisors is an integer number (23447805885).

Almost surely, 2^690693781600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690693781600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844121011860).

690693781600 is an abundant number, since it is smaller than the sum of its proper divisors (997548242120).

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

690693781600 is a wasteful number, since it uses less digits than its factorization.

690693781600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068032 (or 1068019 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 690693781600 in words is "six hundred ninety billion, six hundred ninety-three million, seven hundred eighty-one thousand, six hundred".