9977957810 has 16 divisors (see below), whose sum is σ = 17969264856. Its totient is φ = 3989196288.

The previous prime is 9977957809. The next prime is 9977957839. The reversal of 9977957810 is 187597799.

It can be written as a sum of positive squares in 4 ways, for example, as 9899653009 + 78304801 = 99497^2 + 8849^2 .

It is a super-2 number, since 2×9977957810² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227177 + ... + 267516.

Almost surely, 2^9977957810 is an apocalyptic number.

9977957810 is a deficient number, since it is larger than the sum of its proper divisors (7991307046).

9977957810 is a wasteful number, since it uses less digits than its factorization.

9977957810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496717.

The product of its (nonzero) digits is 10001880, while the sum is 62.

The square root of 9977957810 is about 99889.7282507065. The cubic root of 9977957810 is about 2152.8505769244.

The spelling of 9977957810 in words is "nine billion, nine hundred seventy-seven million, nine hundred fifty-seven thousand, eight hundred ten".