63172157406 has 32 divisors (see below), whose sum is σ = 127306172448. Its totient is φ = 20897172480.

The previous prime is 63172157383. The next prime is 63172157417. The reversal of 63172157406 is 60475127136.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3130806 + ... + 3150918.

It is an arithmetic number, because the mean of its divisors is an integer number (3978317889).

Almost surely, 2^63172157406 is an apocalyptic number.

63172157406 is an abundant number, since it is smaller than the sum of its proper divisors (64134015042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63172157406 is a wasteful number, since it uses less digits than its factorization.

63172157406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24076.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 63172157406 in words is "sixty-three billion, one hundred seventy-two million, one hundred fifty-seven thousand, four hundred six".