76549396481 has 2 divisors, whose sum is σ = 76549396482. Its totient is φ = 76549396480.

The previous prime is 76549396477. The next prime is 76549396499. The reversal of 76549396481 is 18469394567.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49615335025 + 26934061456 = 222745^2 + 164116^2 .

It is a cyclic number.

It is not a de Polignac number, because 76549396481 - 2² = 76549396477 is a prime.

It is a super-2 number, since 2×76549396481² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (76549396471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38274698240 + 38274698241.

It is an arithmetic number, because the mean of its divisors is an integer number (38274698241).

Almost surely, 2^76549396481 is an apocalyptic number.

It is an amenable number.

76549396481 is a deficient number, since it is larger than the sum of its proper divisors (1).

76549396481 is an equidigital number, since it uses as much as digits as its factorization.

76549396481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 62.

The spelling of 76549396481 in words is "seventy-six billion, five hundred forty-nine million, three hundred ninety-six thousand, four hundred eighty-one".