7576135681 has 3 divisors (see below), whose sum is σ = 7576222723. Its totient is φ = 7576048640.

The previous prime is 7576135673. The next prime is 7576135687. The reversal of 7576135681 is 1865316757.

The square root of 7576135681 is 87041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1865316757 = 71 ⋅26272067.

It can be written as a sum of positive squares in only one way, i.e., 7570566081 + 5569600 = 87009^2 + 2360^2 .

It is not a de Polignac number, because 7576135681 - 2³ = 7576135673 is a prime.

It is a super-2 number, since 2×7576135681² (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 (7576135687) 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, 43521 + ... + 130561.

Almost surely, 2^7576135681 is an apocalyptic number.

7576135681 is the 87041-st square number.

7576135681 is the 43521-st centered octagonal number.

It is an amenable number.

7576135681 is a deficient number, since it is larger than the sum of its proper divisors (87042).

7576135681 is an frugal number, since it uses more digits than its factorization.

7576135681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174082 (or 87041 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 49.

The cubic root of 7576135681 is about 1964.0351135213.

Multiplying 7576135681 by its sum of digits (49), we get a square (371230648369 = 609287²).

The spelling of 7576135681 in words is "seven billion, five hundred seventy-six million, one hundred thirty-five thousand, six hundred eighty-one".