40138175999 has 4 divisors (see below), whose sum is σ = 40179260064. Its totient is φ = 40097091936.

The previous prime is 40138175969. The next prime is 40138176007. The reversal of 40138175999 is 99957183104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40138175999 - 2¹² = 40138171903 is a prime.

It is a super-2 number, since 2×40138175999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40138175929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20540567 + ... + 20542520.

It is an arithmetic number, because the mean of its divisors is an integer number (10044815016).

Almost surely, 2^40138175999 is an apocalyptic number.

40138175999 is a deficient number, since it is larger than the sum of its proper divisors (41084065).

40138175999 is an equidigital number, since it uses as much as digits as its factorization.

40138175999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41084064.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 40138175999 in words is "forty billion, one hundred thirty-eight million, one hundred seventy-five thousand, nine hundred ninety-nine".