690689568141 has 6 divisors (see below), whose sum is σ = 997662709550. Its totient is φ = 460459712088.

The previous prime is 690689568139. The next prime is 690689568157. The reversal of 690689568141 is 141865986096.

690689568141 is a `hidden beast` number, since 6 + 9 + 0 + 68 + 9 + 568 + 1 + 4 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 402658778916 + 288030789225 = 634554^2 + 536685^2 .

It is not a de Polignac number, because 690689568141 - 2¹ = 690689568139 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 (690689568131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38371642666 + ... + 38371642683.

Almost surely, 2^690689568141 is an apocalyptic number.

It is an amenable number.

690689568141 is a deficient number, since it is larger than the sum of its proper divisors (306973141409).

690689568141 is a wasteful number, since it uses less digits than its factorization.

690689568141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76743285355 (or 76743285352 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 690689568141 in words is "six hundred ninety billion, six hundred eighty-nine million, five hundred sixty-eight thousand, one hundred forty-one".