12777315782 has 32 divisors (see below), whose sum is σ = 23916121344. Its totient is φ = 4973824800.

The previous prime is 12777315781. The next prime is 12777315827. The reversal of 12777315782 is 28751377721.

It is a self number, because there is not a number n which added to its sum of digits gives 12777315782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12777315781) 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, 143432 + ... + 214772.

It is an arithmetic number, because the mean of its divisors is an integer number (747378792).

Almost surely, 2^12777315782 is an apocalyptic number.

12777315782 is a deficient number, since it is larger than the sum of its proper divisors (11138805562).

12777315782 is a wasteful number, since it uses less digits than its factorization.

12777315782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72524.

The product of its digits is 1152480, while the sum is 50.

The spelling of 12777315782 in words is "twelve billion, seven hundred seventy-seven million, three hundred fifteen thousand, seven hundred eighty-two".