22425784978 has 4 divisors (see below), whose sum is σ = 33638677470. Its totient is φ = 11212892488.

The previous prime is 22425784973. The next prime is 22425785021. The reversal of 22425784978 is 87948752422.

It is a happy number.

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., 22160192769 + 265592209 = 148863^2 + 16297^2 .

It is not an unprimeable number, because it can be changed into a prime (22425784973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606446243 + ... + 5606446246.

Almost surely, 2^22425784978 is an apocalyptic number.

22425784978 is a deficient number, since it is larger than the sum of its proper divisors (11212892492).

22425784978 is a wasteful number, since it uses less digits than its factorization.

22425784978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11212892491.

The product of its digits is 18063360, while the sum is 58.

The spelling of 22425784978 in words is "twenty-two billion, four hundred twenty-five million, seven hundred eighty-four thousand, nine hundred seventy-eight".