40399692173 has 4 divisors (see below), whose sum is σ = 40416966720. Its totient is φ = 40382417628.

The previous prime is 40399692169. The next prime is 40399692181. The reversal of 40399692173 is 37129699304.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40399692173 - 2² = 40399692169 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40399692103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8633765 + ... + 8638442.

It is an arithmetic number, because the mean of its divisors is an integer number (10104241680).

Almost surely, 2^40399692173 is an apocalyptic number.

It is an amenable number.

40399692173 is a deficient number, since it is larger than the sum of its proper divisors (17274547).

40399692173 is a wasteful number, since it uses less digits than its factorization.

40399692173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17274546.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 40399692173 in words is "forty billion, three hundred ninety-nine million, six hundred ninety-two thousand, one hundred seventy-three".