22540290778 has 4 divisors (see below), whose sum is σ = 33810436170. Its totient is φ = 11270145388.

The previous prime is 22540290763. The next prime is 22540290781. The reversal of 22540290778 is 87709204522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21131564689 + 1408726089 = 145367^2 + 37533^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5635072693 + ... + 5635072696.

Almost surely, 2^22540290778 is an apocalyptic number.

22540290778 is a deficient number, since it is larger than the sum of its proper divisors (11270145392).

22540290778 is a wasteful number, since it uses less digits than its factorization.

22540290778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11270145391.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 22540290778 in words is "twenty-two billion, five hundred forty million, two hundred ninety thousand, seven hundred seventy-eight".