7157521508 has 12 divisors (see below), whose sum is σ = 12527440380. Its totient is φ = 3578252832.

The previous prime is 7157521489. The next prime is 7157521519. The reversal of 7157521508 is 8051257517.

It can be written as a sum of positive squares in 2 ways, for example, as 5210241124 + 1947280384 = 72182^2 + 44128^2 .

It is a super-2 number, since 2×7157521508² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94343 + ... + 152366.

It is an arithmetic number, because the mean of its divisors is an integer number (1043953365).

Almost surely, 2^7157521508 is an apocalyptic number.

It is an amenable number.

7157521508 is a deficient number, since it is larger than the sum of its proper divisors (5369918872).

7157521508 is a wasteful number, since it uses less digits than its factorization.

7157521508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253966 (or 253964 counting only the distinct ones).

The product of its (nonzero) digits is 98000, while the sum is 41.

The square root of 7157521508 is about 84602.1365451251. The cubic root of 7157521508 is about 1927.1738198017.

The spelling of 7157521508 in words is "seven billion, one hundred fifty-seven million, five hundred twenty-one thousand, five hundred eight".