690740525691 has 40 divisors (see below), whose sum is σ = 1036253300544. Its totient is φ = 458531124480.

The previous prime is 690740525689. The next prime is 690740525707. The reversal of 690740525691 is 196525047096.

690740525691 is a `hidden beast` number, since 6 + 9 + 0 + 74 + 0 + 5 + 2 + 569 + 1 = 666.

It is not a de Polignac number, because 690740525691 - 2¹ = 690740525689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690740525621) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19631971 + ... + 19667123.

Almost surely, 2^690740525691 is an apocalyptic number.

690740525691 is a deficient number, since it is larger than the sum of its proper divisors (345512774853).

690740525691 is a wasteful number, since it uses less digits than its factorization.

690740525691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36193 (or 36184 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 690740525691 in words is "six hundred ninety billion, seven hundred forty million, five hundred twenty-five thousand, six hundred ninety-one".