63172043475 has 12 divisors (see below), whose sum is σ = 104444445336. Its totient is φ = 33691756480.

The previous prime is 63172043447. The next prime is 63172043479. The reversal of 63172043475 is 57434027136.

It is a de Polignac number, because none of the positive numbers 2^k-63172043475 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63172043479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421146882 + ... + 421147031.

It is an arithmetic number, because the mean of its divisors is an integer number (8703703778).

Almost surely, 2^63172043475 is an apocalyptic number.

63172043475 is a deficient number, since it is larger than the sum of its proper divisors (41272401861).

63172043475 is a wasteful number, since it uses less digits than its factorization.

63172043475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842293926 (or 842293921 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 63172043475 in words is "sixty-three billion, one hundred seventy-two million, forty-three thousand, four hundred seventy-five".