77015760407749 has 2 divisors, whose sum is σ = 77015760407750. Its totient is φ = 77015760407748.

The previous prime is 77015760407743. The next prime is 77015760407753. The reversal of 77015760407749 is 94770406751077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76703790124900 + 311970282849 = 8758070^2 + 558543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77015760407749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77015760407743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38507880203874 + 38507880203875.

It is an arithmetic number, because the mean of its divisors is an integer number (38507880203875).

Almost surely, 2^{77015760407749} is an apocalyptic number.

It is an amenable number.

77015760407749 is a deficient number, since it is larger than the sum of its proper divisors (1).

77015760407749 is an equidigital number, since it uses as much as digits as its factorization.

77015760407749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72606240, while the sum is 64.

The spelling of 77015760407749 in words is "seventy-seven trillion, fifteen billion, seven hundred sixty million, four hundred seven thousand, seven hundred forty-nine".