5251640677 has 6 divisors (see below), whose sum is σ = 5382855314. Its totient is φ = 5123550240.

The previous prime is 5251640587. The next prime is 5251640683. The reversal of 5251640677 is 7760461525.

It can be written as a sum of positive squares in 3 ways, for example, as 1287804996 + 3963835681 = 35886^2 + 62959^2 .

It is not a de Polignac number, because 5251640677 - 2⁷ = 5251640549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5251640077) 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, 1560378 + ... + 1563739.

Almost surely, 2^5251640677 is an apocalyptic number.

It is an amenable number.

5251640677 is a deficient number, since it is larger than the sum of its proper divisors (131214637).

5251640677 is an equidigital number, since it uses as much as digits as its factorization.

5251640677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124199 (or 3124158 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 5251640677 is about 72468.2045934629. The cubic root of 5251640677 is about 1738.1943523793.

The spelling of 5251640677 in words is "five billion, two hundred fifty-one million, six hundred forty thousand, six hundred seventy-seven".