172249456747 has 4 divisors (see below), whose sum is σ = 172251419536. Its totient is φ = 172247493960.

The previous prime is 172249456723. The next prime is 172249456793. The reversal of 172249456747 is 747654942271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172249456747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172249456691 and 172249456700.

It is not an unprimeable number, because it can be changed into a prime (172249466747) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 843279 + ... + 1027432.

It is an arithmetic number, because the mean of its divisors is an integer number (43062854884).

Almost surely, 2^172249456747 is an apocalyptic number.

172249456747 is a deficient number, since it is larger than the sum of its proper divisors (1962789).

172249456747 is an equidigital number, since it uses as much as digits as its factorization.

172249456747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962788.

The product of its digits is 23708160, while the sum is 58.

The spelling of 172249456747 in words is "one hundred seventy-two billion, two hundred forty-nine million, four hundred fifty-six thousand, seven hundred forty-seven".