40179439623 has 4 divisors (see below), whose sum is σ = 53572586168. Its totient is φ = 26786293080.

The previous prime is 40179439621. The next prime is 40179439627. The reversal of 40179439623 is 32693497104.

It is a happy number.

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

It is not a de Polignac number, because 40179439623 - 2¹ = 40179439621 is a prime.

It is a super-2 number, since 2×40179439623² (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 (40179439621) 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, 6696573268 + ... + 6696573273.

It is an arithmetic number, because the mean of its divisors is an integer number (13393146542).

Almost surely, 2^40179439623 is an apocalyptic number.

40179439623 is a deficient number, since it is larger than the sum of its proper divisors (13393146545).

40179439623 is a wasteful number, since it uses less digits than its factorization.

40179439623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13393146544.

The product of its (nonzero) digits is 979776, while the sum is 48.

The spelling of 40179439623 in words is "forty billion, one hundred seventy-nine million, four hundred thirty-nine thousand, six hundred twenty-three".