22779640550 has 48 divisors (see below), whose sum is σ = 44675712000. Its totient is φ = 8617658400.

The previous prime is 22779640523. The next prime is 22779640553. The reversal of 22779640550 is 5504697722.

It is a junction number, because it is equal to n+sod(n) for n = 22779640495 and 22779640504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22779640553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549035 + ... + 589065.

It is an arithmetic number, because the mean of its divisors is an integer number (930744000).

Almost surely, 2^22779640550 is an apocalyptic number.

22779640550 is a deficient number, since it is larger than the sum of its proper divisors (21896071450).

22779640550 is a wasteful number, since it uses less digits than its factorization.

22779640550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40661 (or 40656 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 22779640550 in words is "twenty-two billion, seven hundred seventy-nine million, six hundred forty thousand, five hundred fifty".