108172561447 has 4 divisors (see below), whose sum is σ = 108175317336. Its totient is φ = 108169805560.

The previous prime is 108172561439. The next prime is 108172561457. The reversal of 108172561447 is 744165271801.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 108172561447 - 2³ = 108172561439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108172561397 and 108172561406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108172561457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1318204 + ... + 1397857.

It is an arithmetic number, because the mean of its divisors is an integer number (27043829334).

Almost surely, 2^108172561447 is an apocalyptic number.

108172561447 is a deficient number, since it is larger than the sum of its proper divisors (2755889).

108172561447 is an equidigital number, since it uses as much as digits as its factorization.

108172561447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755888.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 108172561447 in words is "one hundred eight billion, one hundred seventy-two million, five hundred sixty-one thousand, four hundred forty-seven".