22579901778 has 24 divisors (see below), whose sum is σ = 52532833392. Its totient is φ = 6451400424.

The previous prime is 22579901749. The next prime is 22579901783. The reversal of 22579901778 is 87710997522.

It is a super-2 number, since 2×22579901778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38400900 + ... + 38401487.

It is an arithmetic number, because the mean of its divisors is an integer number (2188868058).

Almost surely, 2^22579901778 is an apocalyptic number.

22579901778 is an abundant number, since it is smaller than the sum of its proper divisors (29952931614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22579901778 is a wasteful number, since it uses less digits than its factorization.

22579901778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76802406 (or 76802399 counting only the distinct ones).

The product of its (nonzero) digits is 4445280, while the sum is 57.

The spelling of 22579901778 in words is "twenty-two billion, five hundred seventy-nine million, nine hundred one thousand, seven hundred seventy-eight".