172797120745 has 8 divisors (see below), whose sum is σ = 214506770760. Its totient is φ = 133470879360.

The previous prime is 172797120703. The next prime is 172797120751. The reversal of 172797120745 is 547021797271.

It can be written as a sum of positive squares in 4 ways, for example, as 45545108569 + 127252012176 = 213413^2 + 356724^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172797120745 - 2²¹ = 172795023593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 172797120692 and 172797120701.

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 7 ways as a sum of consecutive naturals, for example, 595851996 + ... + 595852285.

It is an arithmetic number, because the mean of its divisors is an integer number (26813346345).

Almost surely, 2^172797120745 is an apocalyptic number.

It is an amenable number.

172797120745 is a deficient number, since it is larger than the sum of its proper divisors (41709650015).

172797120745 is a wasteful number, since it uses less digits than its factorization.

172797120745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191704315.

The product of its (nonzero) digits is 1728720, while the sum is 52.

The spelling of 172797120745 in words is "one hundred seventy-two billion, seven hundred ninety-seven million, one hundred twenty thousand, seven hundred forty-five".