689696621037 has 12 divisors (see below), whose sum is σ = 996246614844. Its totient is φ = 459789364800.

The previous prime is 689696621023. The next prime is 689696621111. The reversal of 689696621037 is 730126696986.

It can be written as a sum of positive squares in 2 ways, for example, as 607361483556 + 82335137481 = 779334^2 + 286941^2 .

It is not a de Polignac number, because 689696621037 - 2⁷ = 689696620909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689696621737) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 155214 + ... + 1184687.

It is an arithmetic number, because the mean of its divisors is an integer number (83020551237).

Almost surely, 2^689696621037 is an apocalyptic number.

It is an amenable number.

689696621037 is a deficient number, since it is larger than the sum of its proper divisors (306549993807).

689696621037 is a wasteful number, since it uses less digits than its factorization.

689696621037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397100 (or 1397097 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 689696621037 in words is "six hundred eighty-nine billion, six hundred ninety-six million, six hundred twenty-one thousand, thirty-seven".