687434612592 has 400 divisors, whose sum is σ = 2238166970368. Its totient is φ = 180727303680.

The previous prime is 687434612587. The next prime is 687434612639. The reversal of 687434612592 is 295216434786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 693677217 + ... + 693678207.

Almost surely, 2^687434612592 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 687434612592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119083485184).

687434612592 is an abundant number, since it is smaller than the sum of its proper divisors (1550732357776).

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

687434612592 is a wasteful number, since it uses less digits than its factorization.

687434612592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1479 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 57.

The spelling of 687434612592 in words is "six hundred eighty-seven billion, four hundred thirty-four million, six hundred twelve thousand, five hundred ninety-two".