76251642769 has 3 divisors (see below), whose sum is σ = 76251918907. Its totient is φ = 76251366632.

The previous prime is 76251642763. The next prime is 76251642799. The reversal of 76251642769 is 96724615267.

The square root of 76251642769 is 276137.

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., 124211025 + 76127431744 = 11145^2 + 275912^2 .

It is not a de Polignac number, because 76251642769 - 2⁵ = 76251642737 is a prime.

It is a super-2 number, since 2×76251642769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76251642763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 138069 + ... + 414205.

Almost surely, 2^76251642769 is an apocalyptic number.

76251642769 is the 276137-th square number.

76251642769 is the 138069-th centered octagonal number.

It is an amenable number.

76251642769 is a deficient number, since it is larger than the sum of its proper divisors (276138).

76251642769 is an frugal number, since it uses more digits than its factorization.

76251642769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552274 (or 276137 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 55.

The spelling of 76251642769 in words is "seventy-six billion, two hundred fifty-one million, six hundred forty-two thousand, seven hundred sixty-nine".