3157640677 has 4 divisors (see below), whose sum is σ = 3177753196. Its totient is φ = 3137528160.

The previous prime is 3157640653. The next prime is 3157640683. The reversal of 3157640677 is 7760467513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 634989601 + 2522651076 = 25199^2 + 50226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3157640677 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 (3157640627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10056024 + ... + 10056337.

It is an arithmetic number, because the mean of its divisors is an integer number (794438299).

Almost surely, 2^3157640677 is an apocalyptic number.

It is an amenable number.

3157640677 is a deficient number, since it is larger than the sum of its proper divisors (20112519).

3157640677 is a wasteful number, since it uses less digits than its factorization.

3157640677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20112518.

The product of its (nonzero) digits is 740880, while the sum is 46.

The square root of 3157640677 is about 56192.8881354215. Note that the first 3 decimals coincide. The cubic root of 3157640677 is about 1467.0814843590.

The spelling of 3157640677 in words is "three billion, one hundred fifty-seven million, six hundred forty thousand, six hundred seventy-seven".