22546778652 has 120 divisors (see below), whose sum is σ = 63167471136. Its totient is φ = 6994449792.

The previous prime is 22546778651. The next prime is 22546778693. The reversal of 22546778652 is 25687764522.

22546778652 is a `hidden beast` number, since 22 + 546 + 7 + 78 + 6 + 5 + 2 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22546778651) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 234838 + ... + 316610.

Almost surely, 2^22546778652 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 22546778652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31583735568).

22546778652 is an abundant number, since it is smaller than the sum of its proper divisors (40620692484).

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

22546778652 is a wasteful number, since it uses less digits than its factorization.

22546778652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81849 (or 81838 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The spelling of 22546778652 in words is "twenty-two billion, five hundred forty-six million, seven hundred seventy-eight thousand, six hundred fifty-two".