688037227922 has 54 divisors (see below), whose sum is σ = 1152145253511. Its totient is φ = 307928775000.

The previous prime is 688037227907. The next prime is 688037228017. The reversal of 688037227922 is 229722730886.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 344018613961 + 344018613961 = 586531^2 + 586531^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=586531.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 916161047 + ... + 916161797.

Almost surely, 2^688037227922 is an apocalyptic number.

688037227922 is a deficient number, since it is larger than the sum of its proper divisors (464108025589).

688037227922 is an frugal number, since it uses more digits than its factorization.

688037227922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 688037227922 in words is "six hundred eighty-eight billion, thirty-seven million, two hundred twenty-seven thousand, nine hundred twenty-two".