72221055192 has 512 divisors, whose sum is σ = 250588800000. Its totient is φ = 18946068480.

The previous prime is 72221055161. The next prime is 72221055233. The reversal of 72221055192 is 29155012227.

72221055192 is a `hidden beast` number, since 7 + 2 + 2 + 2 + 10 + 551 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 63968484 + ... + 63969612.

It is an arithmetic number, because the mean of its divisors is an integer number (489431250).

Almost surely, 2^72221055192 is an apocalyptic number.

72221055192 is a gapful number since it is divisible by the number (72) 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 72221055192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125294400000).

72221055192 is an abundant number, since it is smaller than the sum of its proper divisors (178367744808).

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

72221055192 is a wasteful number, since it uses less digits than its factorization.

72221055192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 72221055192 in words is "seventy-two billion, two hundred twenty-one million, fifty-five thousand, one hundred ninety-two".