693090639522 has 42 divisors (see below), whose sum is σ = 1558812378027. Its totient is φ = 231019616916.

The previous prime is 693090639517. The next prime is 693090639533. The reversal of 693090639522 is 225936090396.

It can be written as a sum of positive squares in only one way, i.e., 346545319761 + 346545319761 = 588681^2 + 588681^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=588681.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 31777873 + ... + 31799675.

Almost surely, 2^693090639522 is an apocalyptic number.

693090639522 is an abundant number, since it is smaller than the sum of its proper divisors (865721738505).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

693090639522 is an frugal number, since it uses more digits than its factorization.

693090639522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43626 (or 21808 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 54.

The spelling of 693090639522 in words is "six hundred ninety-three billion, ninety million, six hundred thirty-nine thousand, five hundred twenty-two".