2172779354592 has 432 divisors, whose sum is σ = 7856923681152. Its totient is φ = 563216048640.

The previous prime is 2172779354561. The next prime is 2172779354621. The reversal of 2172779354592 is 2954539772712.

It is a happy number.

2172779354592 is a `hidden beast` number, since 2 + 1 + 7 + 2 + 7 + 7 + 9 + 35 + 4 + 592 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 78067783 + ... + 78095609.

It is an arithmetic number, because the mean of its divisors is an integer number (18187323336).

Almost surely, 2^{2172779354592} is an apocalyptic number.

2172779354592 is a gapful number since it is divisible by the number (22) 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 2172779354592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3928461840576).

2172779354592 is an abundant number, since it is smaller than the sum of its proper divisors (5684144326560).

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

2172779354592 is a wasteful number, since it uses less digits than its factorization.

2172779354592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28371 (or 28353 counting only the distinct ones).

The product of its digits is 66679200, while the sum is 63.

The spelling of 2172779354592 in words is "two trillion, one hundred seventy-two billion, seven hundred seventy-nine million, three hundred fifty-four thousand, five hundred ninety-two".