697608977264640 has 2496 divisors, whose sum is σ = 2983195477739520. Its totient is φ = 156037777588224.

The previous prime is 697608977264467. The next prime is 697608977264659. The reversal of 697608977264640 is 46462779806796.

697608977264640 is a `hidden beast` number, since 6 + 9 + 7 + 6 + 0 + 89 + 7 + 72 + 6 + 464 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 697608977264640.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 103150813899 + ... + 103150820661.

Almost surely, 2^{697608977264640} is an apocalyptic number.

697608977264640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697608977264640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1491597738869760).

697608977264640 is an abundant number, since it is smaller than the sum of its proper divisors (2285586500474880).

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

697608977264640 is an frugal number, since it uses more digits than its factorization.

697608977264640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874 (or 6827 counting only the distinct ones).

The product of its (nonzero) digits is 9217732608, while the sum is 81.

The spelling of 697608977264640 in words is "six hundred ninety-seven trillion, six hundred eight billion, nine hundred seventy-seven million, two hundred sixty-four thousand, six hundred forty".