22278201556872 has 32 divisors (see below), whose sum is σ = 55702738476000. Its totient is φ = 7425102574464.

The previous prime is 22278201556861. The next prime is 22278201556879. The reversal of 22278201556872 is 27865510287222.

It is a super-2 number, since 2×22278201556872² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22278201556879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60099573 + ... + 60469124.

It is an arithmetic number, because the mean of its divisors is an integer number (1740710577375).

Almost surely, 2^{22278201556872} is an apocalyptic number.

It is an amenable number.

22278201556872 is an abundant number, since it is smaller than the sum of its proper divisors (33424536919128).

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

22278201556872 is a wasteful number, since it uses less digits than its factorization.

22278201556872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120576405 (or 120576401 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 22278201556872 in words is "twenty-two trillion, two hundred seventy-eight billion, two hundred one million, five hundred fifty-six thousand, eight hundred seventy-two".