40143634431 has 4 divisors (see below), whose sum is σ = 53524845912. Its totient is φ = 26762422952.

The previous prime is 40143634411. The next prime is 40143634439. The reversal of 40143634431 is 13443634104.

It is a happy number.

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 40143634431 - 2⁷ = 40143634303 is a prime.

It is a super-2 number, since 2×40143634431² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40143634392 and 40143634401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40143634439) 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, 6690605736 + ... + 6690605741.

It is an arithmetic number, because the mean of its divisors is an integer number (13381211478).

Almost surely, 2^40143634431 is an apocalyptic number.

40143634431 is a deficient number, since it is larger than the sum of its proper divisors (13381211481).

40143634431 is a wasteful number, since it uses less digits than its factorization.

40143634431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13381211480.

The product of its (nonzero) digits is 41472, while the sum is 33.

The spelling of 40143634431 in words is "forty billion, one hundred forty-three million, six hundred thirty-four thousand, four hundred thirty-one".