77907613308 has 144 divisors (see below), whose sum is σ = 214190643744. Its totient is φ = 21973593600.

The previous prime is 77907613279. The next prime is 77907613313. The reversal of 77907613308 is 80331670977.

It is a super-2 number, since 2×77907613308² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22149966 + ... + 22153482.

It is an arithmetic number, because the mean of its divisors is an integer number (1487435026).

Almost surely, 2^77907613308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77907613308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107095321872).

77907613308 is an abundant number, since it is smaller than the sum of its proper divisors (136283030436).

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

77907613308 is a wasteful number, since it uses less digits than its factorization.

77907613308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4012 (or 4003 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 77907613308 in words is "seventy-seven billion, nine hundred seven million, six hundred thirteen thousand, three hundred eight".