22305607778 has 4 divisors (see below), whose sum is σ = 33458411670. Its totient is φ = 11152803888.

The previous prime is 22305607771. The next prime is 22305607787. The reversal of 22305607778 is 87770650322.

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., 15743473729 + 6562134049 = 125473^2 + 81007^2 .

It is not an unprimeable number, because it can be changed into a prime (22305607771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5576401943 + ... + 5576401946.

Almost surely, 2^22305607778 is an apocalyptic number.

22305607778 is a deficient number, since it is larger than the sum of its proper divisors (11152803892).

22305607778 is a wasteful number, since it uses less digits than its factorization.

22305607778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11152803891.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 22305607778 in words is "twenty-two billion, three hundred five million, six hundred seven thousand, seven hundred seventy-eight".