690647053871 has 16 divisors (see below), whose sum is σ = 732966520320. Its totient is φ = 649354205280.

The previous prime is 690647053769. The next prime is 690647053891. The reversal of 690647053871 is 178350746096.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690647053871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690647053891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16997846 + ... + 17038428.

It is an arithmetic number, because the mean of its divisors is an integer number (45810407520).

Almost surely, 2^690647053871 is an apocalyptic number.

690647053871 is a deficient number, since it is larger than the sum of its proper divisors (42319466449).

690647053871 is a wasteful number, since it uses less digits than its factorization.

690647053871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53206.

The product of its (nonzero) digits is 7620480, while the sum is 56.

The spelling of 690647053871 in words is "six hundred ninety billion, six hundred forty-seven million, fifty-three thousand, eight hundred seventy-one".