77693154691 has 2 divisors, whose sum is σ = 77693154692. Its totient is φ = 77693154690.

The previous prime is 77693154683. The next prime is 77693154739. The reversal of 77693154691 is 19645139677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77693154691 - 2³ = 77693154683 is a prime.

It is not a weakly prime, because it can be changed into another prime (77693155691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38846577345 + 38846577346.

It is an arithmetic number, because the mean of its divisors is an integer number (38846577346).

Almost surely, 2^77693154691 is an apocalyptic number.

77693154691 is a deficient number, since it is larger than the sum of its proper divisors (1).

77693154691 is an equidigital number, since it uses as much as digits as its factorization.

77693154691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8573040, while the sum is 58.

The spelling of 77693154691 in words is "seventy-seven billion, six hundred ninety-three million, one hundred fifty-four thousand, six hundred ninety-one".