77190611947 has 2 divisors, whose sum is σ = 77190611948. Its totient is φ = 77190611946.

The previous prime is 77190611941. The next prime is 77190611977. The reversal of 77190611947 is 74911609177.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77190611947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77190611894 and 77190611903.

It is not a weakly prime, because it can be changed into another prime (77190611941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38595305973 + 38595305974.

It is an arithmetic number, because the mean of its divisors is an integer number (38595305974).

Almost surely, 2^77190611947 is an apocalyptic number.

77190611947 is a deficient number, since it is larger than the sum of its proper divisors (1).

77190611947 is an equidigital number, since it uses as much as digits as its factorization.

77190611947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 52.

The spelling of 77190611947 in words is "seventy-seven billion, one hundred ninety million, six hundred eleven thousand, nine hundred forty-seven".