7801128976 has 45 divisors (see below), whose sum is σ = 15380021599. Its totient is φ = 3833261600.

The previous prime is 7801128941. The next prime is 7801128977. The reversal of 7801128976 is 6798211087.

The square root of 7801128976 is 88324.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×7801128976² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7801128977) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25083861 + ... + 25084171.

Almost surely, 2^7801128976 is an apocalyptic number.

7801128976 is the 88324-th square number.

It is an amenable number.

7801128976 is a deficient number, since it is larger than the sum of its proper divisors (7578892623).

7801128976 is an frugal number, since it uses more digits than its factorization.

7801128976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 49.

The cubic root of 7801128976 is about 1983.2881608304.

Multiplying 7801128976 by its sum of digits (49), we get a square (382255319824 = 618268²).

The spelling of 7801128976 in words is "seven billion, eight hundred one million, one hundred twenty-eight thousand, nine hundred seventy-six".