22776451778 has 4 divisors (see below), whose sum is σ = 34164677670. Its totient is φ = 11388225888.

The previous prime is 22776451771. The next prime is 22776451829. The reversal of 22776451778 is 87715467722.

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., 12244971649 + 10531480129 = 110657^2 + 102623^2 .

It is a super-2 number, since 2×22776451778² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22776451771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5694112943 + ... + 5694112946.

Almost surely, 2^22776451778 is an apocalyptic number.

22776451778 is a deficient number, since it is larger than the sum of its proper divisors (11388225892).

22776451778 is a wasteful number, since it uses less digits than its factorization.

22776451778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11388225891.

The product of its digits is 9219840, while the sum is 56.

The spelling of 22776451778 in words is "twenty-two billion, seven hundred seventy-six million, four hundred fifty-one thousand, seven hundred seventy-eight".