40172005172 has 24 divisors (see below), whose sum is σ = 75715057152. Its totient is φ = 18539388000.

The previous prime is 40172005171. The next prime is 40172005187. The reversal of 40172005172 is 27150027104.

It is a super-2 number, since 2×40172005172² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40172005171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813797 + ... + 861747.

It is an arithmetic number, because the mean of its divisors is an integer number (3154794048).

Almost surely, 2^40172005172 is an apocalyptic number.

It is an amenable number.

40172005172 is a deficient number, since it is larger than the sum of its proper divisors (35543051980).

40172005172 is a wasteful number, since it uses less digits than its factorization.

40172005172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64079 (or 64077 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 29.

The spelling of 40172005172 in words is "forty billion, one hundred seventy-two million, five thousand, one hundred seventy-two".