77448447310517 has 16 divisors (see below), whose sum is σ = 79261222133952. Its totient is φ = 75648723047040.

The previous prime is 77448447310459. The next prime is 77448447310541. The reversal of 77448447310517 is 71501374484477.

It is a cyclic number.

It is not a de Polignac number, because 77448447310517 - 2²⁰ = 77448446261941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77448447310517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77448447310567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265342217 + ... + 265633937.

It is an arithmetic number, because the mean of its divisors is an integer number (4953826383372).

Almost surely, 2^{77448447310517} is an apocalyptic number.

It is an amenable number.

77448447310517 is a deficient number, since it is larger than the sum of its proper divisors (1812774823435).

77448447310517 is a wasteful number, since it uses less digits than its factorization.

77448447310517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314068.

The product of its (nonzero) digits is 73758720, while the sum is 62.

The spelling of 77448447310517 in words is "seventy-seven trillion, four hundred forty-eight billion, four hundred forty-seven million, three hundred ten thousand, five hundred seventeen".