77900028712 has 64 divisors (see below), whose sum is σ = 164554467840. Its totient is φ = 34251571200.

The previous prime is 77900028707. The next prime is 77900028721. The reversal of 77900028712 is 21782000977.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7898088 + ... + 7907944.

It is an arithmetic number, because the mean of its divisors is an integer number (2571163560).

Almost surely, 2^77900028712 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 77900028712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82277233920).

77900028712 is an abundant number, since it is smaller than the sum of its proper divisors (86654439128).

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

77900028712 is a wasteful number, since it uses less digits than its factorization.

77900028712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12802 (or 12798 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 43.

The spelling of 77900028712 in words is "seventy-seven billion, nine hundred million, twenty-eight thousand, seven hundred twelve".