77923555080 has 256 divisors, whose sum is σ = 271587340800. Its totient is φ = 17517772800.

The previous prime is 77923555049. The next prime is 77923555081. The reversal of 77923555080 is 8055532977.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77923555081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24587736 + ... + 24590904.

It is an arithmetic number, because the mean of its divisors is an integer number (1060888050).

Almost surely, 2^77923555080 is an apocalyptic number.

77923555080 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77923555080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135793670400).

77923555080 is an abundant number, since it is smaller than the sum of its proper divisors (193663785720).

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

77923555080 is a wasteful number, since it uses less digits than its factorization.

77923555080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3664 (or 3660 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 51.

The spelling of 77923555080 in words is "seventy-seven billion, nine hundred twenty-three million, five hundred fifty-five thousand, eighty".