9772992778 has 8 divisors (see below), whose sum is σ = 14661505440. Its totient is φ = 4885824300.

The previous prime is 9772992731. The next prime is 9772992797. The reversal of 9772992778 is 8772992779.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×9772992778² (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 3 ways as a sum of consecutive naturals, for example, 317668 + ... + 347071.

It is an arithmetic number, because the mean of its divisors is an integer number (1832688180).

Almost surely, 2^9772992778 is an apocalyptic number.

9772992778 is a deficient number, since it is larger than the sum of its proper divisors (4888512662).

9772992778 is a wasteful number, since it uses less digits than its factorization.

9772992778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672092.

The product of its digits is 56010528, while the sum is 67.

The square root of 9772992778 is about 98858.4481872945. The cubic root of 9772992778 is about 2138.0073437384.

Subtracting from 9772992778 its reverse (8772992779), we obtain a palindrome (999999999).

The spelling of 9772992778 in words is "nine billion, seven hundred seventy-two million, nine hundred ninety-two thousand, seven hundred seventy-eight".