696985090551 has 48 divisors (see below), whose sum is σ = 1054204070400. Its totient is φ = 455111425440.

The previous prime is 696985090511. The next prime is 696985090583. The reversal of 696985090551 is 155090589696.

696985090551 is a `hidden beast` number, since 69 + 69 + 8 + 509 + 0 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 696985090551 - 2¹⁰ = 696985089527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696985090511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23997100 + ... + 24026126.

It is an arithmetic number, because the mean of its divisors is an integer number (21962584800).

Almost surely, 2^696985090551 is an apocalyptic number.

696985090551 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

696985090551 is a deficient number, since it is larger than the sum of its proper divisors (357218979849).

696985090551 is a wasteful number, since it uses less digits than its factorization.

696985090551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29397 (or 29330 counting only the distinct ones).

The product of its (nonzero) digits is 26244000, while the sum is 63.

The spelling of 696985090551 in words is "six hundred ninety-six billion, nine hundred eighty-five million, ninety thousand, five hundred fifty-one".