77919469080 has 128 divisors (see below), whose sum is σ = 236023200000. Its totient is φ = 20577959424.

The previous prime is 77919469057. The next prime is 77919469097. The reversal of 77919469080 is 8096491977.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6983346 + ... + 6994494.

It is an arithmetic number, because the mean of its divisors is an integer number (1843931250).

Almost surely, 2^77919469080 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 77919469080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118011600000).

77919469080 is an abundant number, since it is smaller than the sum of its proper divisors (158103730920).

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

77919469080 is a wasteful number, since it uses less digits than its factorization.

77919469080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11721 (or 11717 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 60.

The spelling of 77919469080 in words is "seventy-seven billion, nine hundred nineteen million, four hundred sixty-nine thousand, eighty".