7275138128 has 40 divisors (see below), whose sum is σ = 14732051880. Its totient is φ = 3475906560.

The previous prime is 7275138109. The next prime is 7275138191. The reversal of 7275138128 is 8218315727.

It can be written as a sum of positive squares in 4 ways, for example, as 679749184 + 6595388944 = 26072^2 + 81212^2 .

It is a congruent 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, 35813 + ... + 125828.

It is an arithmetic number, because the mean of its divisors is an integer number (368301297).

Almost surely, 2^7275138128 is an apocalyptic number.

It is an amenable number.

7275138128 is an abundant number, since it is smaller than the sum of its proper divisors (7456913752).

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

7275138128 is a wasteful number, since it uses less digits than its factorization.

7275138128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161775 (or 161769 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 7275138128 is about 85294.4202629926. The cubic root of 7275138128 is about 1937.6726730491.

The spelling of 7275138128 in words is "seven billion, two hundred seventy-five million, one hundred thirty-eight thousand, one hundred twenty-eight".