9772897761 has 48 divisors (see below), whose sum is σ = 15557068800. Its totient is φ = 5862780000.

The previous prime is 9772897759. The next prime is 9772897789. The reversal of 9772897761 is 1677982779.

It is not a de Polignac number, because 9772897761 - 2¹ = 9772897759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9772897261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4155736 + ... + 4158086.

It is an arithmetic number, because the mean of its divisors is an integer number (324105600).

Almost surely, 2^9772897761 is an apocalyptic number.

It is an amenable number.

9772897761 is a deficient number, since it is larger than the sum of its proper divisors (5784171039).

9772897761 is a wasteful number, since it uses less digits than its factorization.

9772897761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778 (or 2775 counting only the distinct ones).

The product of its digits is 18670176, while the sum is 63.

The square root of 9772897761 is about 98857.9676151599. The cubic root of 9772897761 is about 2138.0004148577. Note that the first 3 decimals are identical.

The spelling of 9772897761 in words is "nine billion, seven hundred seventy-two million, eight hundred ninety-seven thousand, seven hundred sixty-one".