63172446546661 has 4 divisors (see below), whose sum is σ = 66497312154400. Its totient is φ = 59847580938924.

The previous prime is 63172446546659. The next prime is 63172446546809. The reversal of 63172446546661 is 16664564427136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 63172446546661 - 2¹ = 63172446546659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63172446546661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63172446526661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1662432803841 + ... + 1662432803878.

It is an arithmetic number, because the mean of its divisors is an integer number (16624328038600).

Almost surely, 2^{63172446546661} is an apocalyptic number.

It is an amenable number.

63172446546661 is a deficient number, since it is larger than the sum of its proper divisors (3324865607739).

63172446546661 is a wasteful number, since it uses less digits than its factorization.

63172446546661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324865607738.

The product of its digits is 104509440, while the sum is 61.

The spelling of 63172446546661 in words is "sixty-three trillion, one hundred seventy-two billion, four hundred forty-six million, five hundred forty-six thousand, six hundred sixty-one".