77800010647939 has 2 divisors, whose sum is σ = 77800010647940. Its totient is φ = 77800010647938.

The previous prime is 77800010647873. The next prime is 77800010647951. The reversal of 77800010647939 is 93974601000877.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77800010647939 is a prime.

It is not a weakly prime, because it can be changed into another prime (77800010647339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38900005323969 + 38900005323970.

It is an arithmetic number, because the mean of its divisors is an integer number (38900005323970).

Almost surely, 2^{77800010647939} is an apocalyptic number.

77800010647939 is a deficient number, since it is larger than the sum of its proper divisors (1).

77800010647939 is an equidigital number, since it uses as much as digits as its factorization.

77800010647939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16003008, while the sum is 61.

The spelling of 77800010647939 in words is "seventy-seven trillion, eight hundred billion, ten million, six hundred forty-seven thousand, nine hundred thirty-nine".