77889596387 has 2 divisors, whose sum is σ = 77889596388. Its totient is φ = 77889596386.

The previous prime is 77889596359. The next prime is 77889596401. The reversal of 77889596387 is 78369598877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77889596387 - 2²² = 77885402083 is a prime.

It is not a weakly prime, because it can be changed into another prime (77889593387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38944798193 + 38944798194.

It is an arithmetic number, because the mean of its divisors is an integer number (38944798194).

Almost surely, 2^77889596387 is an apocalyptic number.

77889596387 is a deficient number, since it is larger than the sum of its proper divisors (1).

77889596387 is an equidigital number, since it uses as much as digits as its factorization.

77889596387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280240640, while the sum is 77.

The spelling of 77889596387 in words is "seventy-seven billion, eight hundred eighty-nine million, five hundred ninety-six thousand, three hundred eighty-seven".