77889596401 has 2 divisors, whose sum is σ = 77889596402. Its totient is φ = 77889596400.

The previous prime is 77889596387. The next prime is 77889596453. The reversal of 77889596401 is 10469598877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64402258176 + 13487338225 = 253776^2 + 116135^2 .

It is a cyclic number.

It is not a de Polignac number, because 77889596401 - 2³⁵ = 43529858033 is a prime.

It is not a weakly prime, because it can be changed into another prime (77889596101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38944798200 + 38944798201.

It is an arithmetic number, because the mean of its divisors is an integer number (38944798201).

Almost surely, 2^77889596401 is an apocalyptic number.

It is an amenable number.

77889596401 is a deficient number, since it is larger than the sum of its proper divisors (1).

77889596401 is an equidigital number, since it uses as much as digits as its factorization.

77889596401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 64.

The spelling of 77889596401 in words is "seventy-seven billion, eight hundred eighty-nine million, five hundred ninety-six thousand, four hundred one".