688361031122 has 30 divisors (see below), whose sum is σ = 1061396301465. Its totient is φ = 334823731680.

The previous prime is 688361031089. The next prime is 688361031151. The reversal of 688361031122 is 221130163886.

It can be written as a sum of positive squares in 8 ways, for example, as 412062570241 + 276298460881 = 641921^2 + 525641^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=586669.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688361031122.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1972381004 + ... + 1972381352.

Almost surely, 2^688361031122 is an apocalyptic number.

688361031122 is a deficient number, since it is larger than the sum of its proper divisors (373035270343).

688361031122 is an frugal number, since it uses more digits than its factorization.

688361031122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The spelling of 688361031122 in words is "six hundred eighty-eight billion, three hundred sixty-one million, thirty-one thousand, one hundred twenty-two".