40172090217 has 16 divisors (see below), whose sum is σ = 61696622592. Its totient is φ = 22774726800.

The previous prime is 40172090207. The next prime is 40172090243. The reversal of 40172090217 is 71209027104.

It is not a de Polignac number, because 40172090217 - 2¹⁴ = 40172073833 is a prime.

It is a super-2 number, since 2×40172090217² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40172090207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7528659 + ... + 7533992.

It is an arithmetic number, because the mean of its divisors is an integer number (3856038912).

Almost surely, 2^40172090217 is an apocalyptic number.

It is an amenable number.

40172090217 is a deficient number, since it is larger than the sum of its proper divisors (21524532375).

40172090217 is a wasteful number, since it uses less digits than its factorization.

40172090217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15062788.

The product of its (nonzero) digits is 7056, while the sum is 33.

The spelling of 40172090217 in words is "forty billion, one hundred seventy-two million, ninety thousand, two hundred seventeen".