690982540657 has 8 divisors (see below), whose sum is σ = 722958312384. Its totient is φ = 659167856688.

The previous prime is 690982540621. The next prime is 690982540691. The reversal of 690982540657 is 756045289096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690982540657 - 2⁷ = 690982540529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690982540595 and 690982540604.

It is not an unprimeable number, because it can be changed into a prime (690982540607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40263163 + ... + 40280320.

It is an arithmetic number, because the mean of its divisors is an integer number (90369789048).

Almost surely, 2^690982540657 is an apocalyptic number.

It is an amenable number.

690982540657 is a deficient number, since it is larger than the sum of its proper divisors (31975771727).

690982540657 is a wasteful number, since it uses less digits than its factorization.

690982540657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80543879.

The product of its (nonzero) digits is 32659200, while the sum is 61.

The spelling of 690982540657 in words is "six hundred ninety billion, nine hundred eighty-two million, five hundred forty thousand, six hundred fifty-seven".