690851690865 has 96 divisors (see below), whose sum is σ = 1413857642496. Its totient is φ = 305377827840.

The previous prime is 690851690857. The next prime is 690851690891. The reversal of 690851690865 is 568096158096.

690851690865 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690851690865 - 2³ = 690851690857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 12050709 + ... + 12107901.

It is an arithmetic number, because the mean of its divisors is an integer number (14727683776).

Almost surely, 2^690851690865 is an apocalyptic number.

It is an amenable number.

690851690865 is an abundant number, since it is smaller than the sum of its proper divisors (723005951631).

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

690851690865 is a wasteful number, since it uses less digits than its factorization.

690851690865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58479 (or 58476 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 690851690865 in words is "six hundred ninety billion, eight hundred fifty-one million, six hundred ninety thousand, eight hundred sixty-five".