77136077720 has 64 divisors (see below), whose sum is σ = 187442640000. Its totient is φ = 28399339008.

The previous prime is 77136077687. The next prime is 77136077737. The reversal of 77136077720 is 2777063177.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31040 + ... + 393999.

It is an arithmetic number, because the mean of its divisors is an integer number (2928791250).

Almost surely, 2^77136077720 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 77136077720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93721320000).

77136077720 is an abundant number, since it is smaller than the sum of its proper divisors (110306562280).

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

77136077720 is a wasteful number, since it uses less digits than its factorization.

77136077720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425412 (or 425408 counting only the distinct ones).

The product of its (nonzero) digits is 605052, while the sum is 47.

The spelling of 77136077720 in words is "seventy-seven billion, one hundred thirty-six million, seventy-seven thousand, seven hundred twenty".