654991386696 has 80 divisors (see below), whose sum is σ = 1837762924140. Its totient is φ = 217951948800.

The previous prime is 654991386659. The next prime is 654991386743. The reversal of 654991386696 is 696683199456.

654991386696 is a `hidden beast` number, since 6 + 549 + 9 + 13 + 8 + 6 + 69 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 566728918596 + 88262468100 = 752814^2 + 297090^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 502005 + ... + 1249796.

Almost surely, 2^654991386696 is an apocalyptic number.

It is an amenable number.

654991386696 is an abundant number, since it is smaller than the sum of its proper divisors (1182771537444).

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

654991386696 is a wasteful number, since it uses less digits than its factorization.

654991386696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752396 (or 1752383 counting only the distinct ones).

The product of its digits is 453496320, while the sum is 72.

The spelling of 654991386696 in words is "six hundred fifty-four billion, nine hundred ninety-one million, three hundred eighty-six thousand, six hundred ninety-six".