688432761506 has 48 divisors (see below), whose sum is σ = 1206526702752. Its totient is φ = 293746320000.

The previous prime is 688432761473. The next prime is 688432761539. The reversal of 688432761506 is 605167234886.

It is an interprime number because it is at equal distance from previous prime (688432761473) and next prime (688432761539).

It is a super-2 number, since 2×688432761506² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85867610 + ... + 85875626.

It is an arithmetic number, because the mean of its divisors is an integer number (25135972974).

Almost surely, 2^688432761506 is an apocalyptic number.

688432761506 is a deficient number, since it is larger than the sum of its proper divisors (518093941246).

688432761506 is a wasteful number, since it uses less digits than its factorization.

688432761506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11775 (or 11768 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 56.

The spelling of 688432761506 in words is "six hundred eighty-eight billion, four hundred thirty-two million, seven hundred sixty-one thousand, five hundred six".