690655888628 has 12 divisors (see below), whose sum is σ = 1208653710432. Its totient is φ = 345326257080.

The previous prime is 690655888621. The next prime is 690655888693. The reversal of 690655888628 is 826888556096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690655888621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1150001 + ... + 1644327.

It is an arithmetic number, because the mean of its divisors is an integer number (100721142536).

Almost surely, 2^690655888628 is an apocalyptic number.

It is an amenable number.

690655888628 is a deficient number, since it is larger than the sum of its proper divisors (517997821804).

690655888628 is a wasteful number, since it uses less digits than its factorization.

690655888628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843622 (or 843620 counting only the distinct ones).

The product of its (nonzero) digits is 398131200, while the sum is 71.

The spelling of 690655888628 in words is "six hundred ninety billion, six hundred fifty-five million, eight hundred eighty-eight thousand, six hundred twenty-eight".