7125138992 has 40 divisors (see below), whose sum is σ = 14306532240. Its totient is φ = 3433570560.

The previous prime is 7125138971. The next prime is 7125139009. The reversal of 7125138992 is 2998315217.

It is a happy number.

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, 251498 + ... + 278390.

It is an arithmetic number, because the mean of its divisors is an integer number (357663306).

Almost surely, 2^7125138992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7125138992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7153266120).

7125138992 is an abundant number, since it is smaller than the sum of its proper divisors (7181393248).

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

7125138992 is a wasteful number, since it uses less digits than its factorization.

7125138992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27501 (or 27495 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 7125138992 is about 84410.5383942076. The cubic root of 7125138992 is about 1924.2630780920.

The spelling of 7125138992 in words is "seven billion, one hundred twenty-five million, one hundred thirty-eight thousand, nine hundred ninety-two".