22774170978 has 128 divisors (see below), whose sum is σ = 55026639360. Its totient is φ = 6940442880.

The previous prime is 22774170977. The next prime is 22774170997. The reversal of 22774170978 is 87907147722.

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

It is not an unprimeable number, because it can be changed into a prime (22774170971) 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, 54095208 + ... + 54095628.

It is an arithmetic number, because the mean of its divisors is an integer number (429895620).

Almost surely, 2^22774170978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22774170978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27513319680).

22774170978 is an abundant number, since it is smaller than the sum of its proper divisors (32252468382).

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

22774170978 is a wasteful number, since it uses less digits than its factorization.

22774170978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 54.

The spelling of 22774170978 in words is "twenty-two billion, seven hundred seventy-four million, one hundred seventy thousand, nine hundred seventy-eight".