22778917146 has 64 divisors (see below), whose sum is σ = 53609241600. Its totient is φ = 7154416368.

The previous prime is 22778917127. The next prime is 22778917171. The reversal of 22778917146 is 64171987722.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 22778917092 and 22778917101.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53656 + ... + 220083.

It is an arithmetic number, because the mean of its divisors is an integer number (837644400).

Almost surely, 2^22778917146 is an apocalyptic number.

22778917146 is an abundant number, since it is smaller than the sum of its proper divisors (30830324454).

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

22778917146 is a wasteful number, since it uses less digits than its factorization.

22778917146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273840 (or 273834 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 22778917146 in words is "twenty-two billion, seven hundred seventy-eight million, nine hundred seventeen thousand, one hundred forty-six".