77700012992 has 112 divisors (see below), whose sum is σ = 191470970880. Its totient is φ = 30529612800.

The previous prime is 77700012991. The next prime is 77700013003. The reversal of 77700012992 is 29921000777.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77700012991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116642 + ... + 411102.

It is an arithmetic number, because the mean of its divisors is an integer number (1709562240).

Almost surely, 2^77700012992 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 77700012992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95735485440).

77700012992 is an abundant number, since it is smaller than the sum of its proper divisors (113770957888).

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

77700012992 is a wasteful number, since it uses less digits than its factorization.

77700012992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294530 (or 294520 counting only the distinct ones).

The product of its (nonzero) digits is 111132, while the sum is 44.

The spelling of 77700012992 in words is "seventy-seven billion, seven hundred million, twelve thousand, nine hundred ninety-two".