77999922000 has 2400 divisors, whose sum is σ = 390640783104. Its totient is φ = 14556672000.

The previous prime is 77999921981. The next prime is 77999922001. The reversal of 77999922000 is 22999977.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77999922001) by changing a digit.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 2108105982 + ... + 2108106018.

Almost surely, 2^77999922000 is an apocalyptic number.

77999922000 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 77999922000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195320391552).

77999922000 is an abundant number, since it is smaller than the sum of its proper divisors (312640861104).

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

77999922000 is a wasteful number, since it uses less digits than its factorization.

77999922000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

It can be divided in two parts, 77999 and 922000, that added together give a palindrome (999999).

The spelling of 77999922000 in words is "seventy-seven billion, nine hundred ninety-nine million, nine hundred twenty-two thousand".