76747136513 has 4 divisors (see below), whose sum is σ = 76752524868. Its totient is φ = 76741748160.

The previous prime is 76747136413. The next prime is 76747136537. The reversal of 76747136513 is 31563174767.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26617269904 + 50129866609 = 163148^2 + 223897^2 .

It is a cyclic number.

It is not a de Polignac number, because 76747136513 - 2²² = 76742942209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76747136113) 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 3 ways as a sum of consecutive naturals, for example, 2672756 + ... + 2701317.

It is an arithmetic number, because the mean of its divisors is an integer number (19188131217).

Almost surely, 2^76747136513 is an apocalyptic number.

It is an amenable number.

76747136513 is a deficient number, since it is larger than the sum of its proper divisors (5388355).

76747136513 is a wasteful number, since it uses less digits than its factorization.

76747136513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5388354.

The product of its digits is 2222640, while the sum is 50.

The spelling of 76747136513 in words is "seventy-six billion, seven hundred forty-seven million, one hundred thirty-six thousand, five hundred thirteen".