9999957714977 has 2 divisors, whose sum is σ = 9999957714978. Its totient is φ = 9999957714976.

The previous prime is 9999957714959. The next prime is 9999957715043. The reversal of 9999957714977 is 7794177599999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9289913860096 + 710043854881 = 3047936^2 + 842641^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999957714977 - 2¹⁸ = 9999957452833 is a prime.

It is a super-2 number, since 2×9999957714977² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9999957714907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999978857488 + 4999978857489.

It is an arithmetic number, because the mean of its divisors is an integer number (4999978857489).

Almost surely, 2^{9999957714977} is an apocalyptic number.

It is an amenable number.

9999957714977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999957714977 is an equidigital number, since it uses as much as digits as its factorization.

9999957714977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25519796820, while the sum is 92.

The spelling of 9999957714977 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred fifty-seven million, seven hundred fourteen thousand, nine hundred seventy-seven".