687255776808812 has 24 divisors (see below), whose sum is σ = 1266004765885440. Its totient is φ = 325540337478480.

The previous prime is 687255776808791. The next prime is 687255776808851. The reversal of 687255776808812 is 218808677552786.

It is a super-2 number, since 2×687255776808812² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12664208 + ... + 39177719.

It is an arithmetic number, because the mean of its divisors is an integer number (52750198578560).

Almost surely, 2^{687255776808812} is an apocalyptic number.

It is an amenable number.

687255776808812 is a deficient number, since it is larger than the sum of its proper divisors (578748989076628).

687255776808812 is a wasteful number, since it uses less digits than its factorization.

687255776808812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52016381 (or 52016379 counting only the distinct ones).

The product of its (nonzero) digits is 5057740800, while the sum is 80.

The spelling of 687255776808812 in words is "six hundred eighty-seven trillion, two hundred fifty-five billion, seven hundred seventy-six million, eight hundred eight thousand, eight hundred twelve".