7657825081 has 3 divisors (see below), whose sum is σ = 7657912591. Its totient is φ = 7657737572.

The previous prime is 7657825031. The next prime is 7657825093. The reversal of 7657825081 is 1805287567.

The square root of 7657825081 is 87509.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7489344681 + 168480400 = 86541^2 + 12980^2 .

It is not a de Polignac number, because 7657825081 - 2²⁷ = 7523607353 is a prime.

It is a super-2 number, since 2×7657825081² (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 (7657825001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 43755 + ... + 131263.

Almost surely, 2^7657825081 is an apocalyptic number.

7657825081 is the 87509-th square number.

7657825081 is the 43755-th centered octagonal number.

It is an amenable number.

7657825081 is a deficient number, since it is larger than the sum of its proper divisors (87510).

7657825081 is an frugal number, since it uses more digits than its factorization.

7657825081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175018 (or 87509 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The cubic root of 7657825081 is about 1971.0689382052.

Multiplying 7657825081 by its sum of digits (49), we get a square (375233428969 = 612563²).

The spelling of 7657825081 in words is "seven billion, six hundred fifty-seven million, eight hundred twenty-five thousand, eighty-one".