77764011580819 has 4 divisors (see below), whose sum is σ = 78229664344944. Its totient is φ = 77298358816696.

The previous prime is 77764011580781. The next prime is 77764011580873. The reversal of 77764011580819 is 91808511046777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77764011580819 is a prime.

It is a super-2 number, since 2×77764011580819² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77764011581819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232826381812 + ... + 232826382145.

It is an arithmetic number, because the mean of its divisors is an integer number (19557416086236).

Almost surely, 2^{77764011580819} is an apocalyptic number.

77764011580819 is a deficient number, since it is larger than the sum of its proper divisors (465652764125).

77764011580819 is a wasteful number, since it uses less digits than its factorization.

77764011580819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465652764124.

The product of its (nonzero) digits is 23708160, while the sum is 64.

The spelling of 77764011580819 in words is "seventy-seven trillion, seven hundred sixty-four billion, eleven million, five hundred eighty thousand, eight hundred nineteen".