40170142243172 has 24 divisors (see below), whose sum is σ = 74433726936576. Its totient is φ = 18903389033088.

The previous prime is 40170142243171. The next prime is 40170142243177. The reversal of 40170142243172 is 27134224107104.

It is a super-2 number, since 2×40170142243172² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40170142243171) 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, 3097133 + ... + 9483275.

It is an arithmetic number, because the mean of its divisors is an integer number (3101405289024).

Almost surely, 2^{40170142243172} is an apocalyptic number.

It is an amenable number.

40170142243172 is a deficient number, since it is larger than the sum of its proper divisors (34263584693404).

40170142243172 is a wasteful number, since it uses less digits than its factorization.

40170142243172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478667 (or 6478665 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 40170142243172 in words is "forty trillion, one hundred seventy billion, one hundred forty-two million, two hundred forty-three thousand, one hundred seventy-two".