40134745423 has 4 divisors (see below), whose sum is σ = 40196208168. Its totient is φ = 40073282680.

The previous prime is 40134745421. The next prime is 40134745481. The reversal of 40134745423 is 32454743104.

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 40134745423 - 2¹ = 40134745421 is a prime.

It is a super-2 number, since 2×40134745423² (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 (40134745421) 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, 30730393 + ... + 30731698.

It is an arithmetic number, because the mean of its divisors is an integer number (10049052042).

Almost surely, 2^40134745423 is an apocalyptic number.

40134745423 is a deficient number, since it is larger than the sum of its proper divisors (61462745).

40134745423 is an equidigital number, since it uses as much as digits as its factorization.

40134745423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61462744.

The product of its (nonzero) digits is 161280, while the sum is 37.

The spelling of 40134745423 in words is "forty billion, one hundred thirty-four million, seven hundred forty-five thousand, four hundred twenty-three".