40172334043381 has 2 divisors, whose sum is σ = 40172334043382. Its totient is φ = 40172334043380.

The previous prime is 40172334043333. The next prime is 40172334043487. The reversal of 40172334043381 is 18334043327104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31731072045156 + 8441261998225 = 5633034^2 + 2905385^2 .

It is a cyclic number.

It is not a de Polignac number, because 40172334043381 - 2²⁹ = 40171797172469 is a prime.

It is a super-2 number, since 2×40172334043381² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40172334043981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20086167021690 + 20086167021691.

It is an arithmetic number, because the mean of its divisors is an integer number (20086167021691).

Almost surely, 2^{40172334043381} is an apocalyptic number.

It is an amenable number.

40172334043381 is a deficient number, since it is larger than the sum of its proper divisors (1).

40172334043381 is an equidigital number, since it uses as much as digits as its factorization.

40172334043381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 40172334043381 in words is "forty trillion, one hundred seventy-two billion, three hundred thirty-four million, forty-three thousand, three hundred eighty-one".