690599849840640 has 208 divisors, whose sum is σ = 2455166395214400. Its totient is φ = 184159959810048.

The previous prime is 690599849840639. The next prime is 690599849840653. The reversal of 690599849840640 is 46048948995096.

690599849840640 is a `hidden beast` number, since 6 + 9 + 0 + 5 + 9 + 9 + 84 + 98 + 406 + 40 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 690599849840640.

It is a congruent number.

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, 623904370 + ... + 625010289.

Almost surely, 2^{690599849840640} is an apocalyptic number.

690599849840640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

690599849840640 is an abundant number, since it is smaller than the sum of its proper divisors (1764566545373760).

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

690599849840640 is a wasteful number, since it uses less digits than its factorization.

690599849840640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248914697 (or 1248914669 counting only the distinct ones).

The product of its (nonzero) digits is 4837294080, while the sum is 81.

The spelling of 690599849840640 in words is "six hundred ninety trillion, five hundred ninety-nine billion, eight hundred forty-nine million, eight hundred forty thousand, six hundred forty".