77610651091 has 2 divisors, whose sum is σ = 77610651092. Its totient is φ = 77610651090.

The previous prime is 77610651011. The next prime is 77610651113. The reversal of 77610651091 is 19015601677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77610651091 - 2⁷ = 77610650963 is a prime.

It is not a weakly prime, because it can be changed into another prime (77610651011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38805325545 + 38805325546.

It is an arithmetic number, because the mean of its divisors is an integer number (38805325546).

Almost surely, 2^77610651091 is an apocalyptic number.

77610651091 is a deficient number, since it is larger than the sum of its proper divisors (1).

77610651091 is an equidigital number, since it uses as much as digits as its factorization.

77610651091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 43.

The spelling of 77610651091 in words is "seventy-seven billion, six hundred ten million, six hundred fifty-one thousand, ninety-one".