422557445772 has 144 divisors (see below), whose sum is σ = 1336880143872. Its totient is φ = 109327933440.

The previous prime is 422557445731. The next prime is 422557445867. The reversal of 422557445772 is 277544755224.

422557445772 is a `hidden beast` number, since 4 + 2 + 2 + 55 + 74 + 457 + 72 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 415833 + ... + 1008975.

It is an arithmetic number, because the mean of its divisors is an integer number (9283889888).

Almost surely, 2^422557445772 is an apocalyptic number.

422557445772 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422557445772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668440071936).

422557445772 is an abundant number, since it is smaller than the sum of its proper divisors (914322698100).

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

422557445772 is a wasteful number, since it uses less digits than its factorization.

422557445772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593428 (or 593423 counting only the distinct ones).

The product of its digits is 21952000, while the sum is 54.

The spelling of 422557445772 in words is "four hundred twenty-two billion, five hundred fifty-seven million, four hundred forty-five thousand, seven hundred seventy-two".