76061990561 has 2 divisors, whose sum is σ = 76061990562. Its totient is φ = 76061990560.

The previous prime is 76061990519. The next prime is 76061990591. The reversal of 76061990561 is 16509916067.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50734859536 + 25327131025 = 225244^2 + 159145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76061990561 is a prime.

It is not a weakly prime, because it can be changed into another prime (76061990591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38030995280 + 38030995281.

It is an arithmetic number, because the mean of its divisors is an integer number (38030995281).

Almost surely, 2^76061990561 is an apocalyptic number.

It is an amenable number.

76061990561 is a deficient number, since it is larger than the sum of its proper divisors (1).

76061990561 is an equidigital number, since it uses as much as digits as its factorization.

76061990561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 76061990561 in words is "seventy-six billion, sixty-one million, nine hundred ninety thousand, five hundred sixty-one".