5656637377 has 2 divisors, whose sum is σ = 5656637378. Its totient is φ = 5656637376.

The previous prime is 5656637339. The next prime is 5656637381. The reversal of 5656637377 is 7737366565.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5359557681 + 297079696 = 73209^2 + 17236^2 .

It is a cyclic number.

It is not a de Polignac number, because 5656637377 - 2¹¹ = 5656635329 is a prime.

It is not a weakly prime, because it can be changed into another prime (5656697377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2828318688 + 2828318689.

It is an arithmetic number, because the mean of its divisors is an integer number (2828318689).

Almost surely, 2^5656637377 is an apocalyptic number.

It is an amenable number.

5656637377 is a deficient number, since it is larger than the sum of its proper divisors (1).

5656637377 is an equidigital number, since it uses as much as digits as its factorization.

5656637377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16669800, while the sum is 55.

The square root of 5656637377 is about 75210.6201078013. The cubic root of 5656637377 is about 1781.7746658048.

The spelling of 5656637377 in words is "five billion, six hundred fifty-six million, six hundred thirty-seven thousand, three hundred seventy-seven".