77479015260 has 24 divisors (see below), whose sum is σ = 216941242896. Its totient is φ = 20661070720.

The previous prime is 77479015223. The next prime is 77479015267. The reversal of 77479015260 is 6251097477.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77479015267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645658401 + ... + 645658520.

It is an arithmetic number, because the mean of its divisors is an integer number (9039218454).

Almost surely, 2^77479015260 is an apocalyptic number.

It is an amenable number.

77479015260 is an abundant number, since it is smaller than the sum of its proper divisors (139462227636).

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

77479015260 is a wasteful number, since it uses less digits than its factorization.

77479015260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291316933 (or 1291316931 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 48.

The spelling of 77479015260 in words is "seventy-seven billion, four hundred seventy-nine million, fifteen thousand, two hundred sixty".