77271312715564 has 48 divisors (see below), whose sum is σ = 155293152900480. Its totient is φ = 33272351735040.

The previous prime is 77271312715561. The next prime is 77271312715577. The reversal of 77271312715564 is 46551721317277.

It is a junction number, because it is equal to n+sod(n) for n = 77271312715499 and 77271312715508.

It is not an unprimeable number, because it can be changed into a prime (77271312715561) 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, 8438287 + ... + 15024889.

It is an arithmetic number, because the mean of its divisors is an integer number (3235274018760).

Almost surely, 2^{77271312715564} is an apocalyptic number.

It is an amenable number.

77271312715564 is an abundant number, since it is smaller than the sum of its proper divisors (78021840184916).

77271312715564 is a wasteful number, since it uses less digits than its factorization.

77271312715564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6600670 (or 6600668 counting only the distinct ones).

The product of its digits is 17287200, while the sum is 58.

The spelling of 77271312715564 in words is "seventy-seven trillion, two hundred seventy-one billion, three hundred twelve million, seven hundred fifteen thousand, five hundred sixty-four".