7909997144 has 16 divisors (see below), whose sum is σ = 16949994000. Its totient is φ = 3389998752.

The previous prime is 7909997131. The next prime is 7909997203. The reversal of 7909997144 is 4417999097.

It is a congruent number.

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, 70624919 + ... + 70625030.

It is an arithmetic number, because the mean of its divisors is an integer number (1059374625).

Almost surely, 2^7909997144 is an apocalyptic number.

It is an amenable number.

7909997144 is an abundant number, since it is smaller than the sum of its proper divisors (9039996856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7909997144 is a wasteful number, since it uses less digits than its factorization.

7909997144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141249962 (or 141249958 counting only the distinct ones).

The product of its (nonzero) digits is 5143824, while the sum is 59.

The square root of 7909997144 is about 88938.1647213388. The cubic root of 7909997144 is about 1992.4714580875.

The spelling of 7909997144 in words is "seven billion, nine hundred nine million, nine hundred ninety-seven thousand, one hundred forty-four".