77731565060 has 12 divisors (see below), whose sum is σ = 163236286668. Its totient is φ = 31092626016.

The previous prime is 77731565047. The next prime is 77731565063. The reversal of 77731565060 is 6056513777.

It can be written as a sum of positive squares in 2 ways, for example, as 58726736896 + 19004828164 = 242336^2 + 137858^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77731564996 and 77731565014.

It is not an unprimeable number, because it can be changed into a prime (77731565063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943289107 + ... + 1943289146.

It is an arithmetic number, because the mean of its divisors is an integer number (13603023889).

Almost surely, 2^77731565060 is an apocalyptic number.

It is an amenable number.

77731565060 is an abundant number, since it is smaller than the sum of its proper divisors (85504721608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77731565060 is a wasteful number, since it uses less digits than its factorization.

77731565060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886578262 (or 3886578260 counting only the distinct ones).

The product of its (nonzero) digits is 926100, while the sum is 47.

It can be divided in two parts, 77 and 731565060, that added together give a palindrome (731565137).

The spelling of 77731565060 in words is "seventy-seven billion, seven hundred thirty-one million, five hundred sixty-five thousand, sixty".