690912422640 has 240 divisors, whose sum is σ = 2599665191136. Its totient is φ = 162966988800.

The previous prime is 690912422639. The next prime is 690912422659. The reversal of 690912422640 is 46224219096.

690912422640 is a `hidden beast` number, since 69 + 0 + 91 + 242 + 264 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 885831 + ... + 1471910.

Almost surely, 2^690912422640 is an apocalyptic number.

690912422640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

690912422640 is an abundant number, since it is smaller than the sum of its proper divisors (1908752768496).

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

690912422640 is a wasteful number, since it uses less digits than its factorization.

690912422640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357808 (or 2357799 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 690912422640 in words is "six hundred ninety billion, nine hundred twelve million, four hundred twenty-two thousand, six hundred forty".