40046442431 has 2 divisors, whose sum is σ = 40046442432. Its totient is φ = 40046442430.

The previous prime is 40046442427. The next prime is 40046442437. The reversal of 40046442431 is 13424464004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40046442431 - 2² = 40046442427 is a prime.

It is a super-2 number, since 2×40046442431² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40046442437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20023221215 + 20023221216.

It is an arithmetic number, because the mean of its divisors is an integer number (20023221216).

Almost surely, 2^40046442431 is an apocalyptic number.

40046442431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40046442431 is an equidigital number, since it uses as much as digits as its factorization.

40046442431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 32.

The spelling of 40046442431 in words is "forty billion, forty-six million, four hundred forty-two thousand, four hundred thirty-one".