40555789931 has 2 divisors, whose sum is σ = 40555789932. Its totient is φ = 40555789930.

The previous prime is 40555789889. The next prime is 40555789943. The reversal of 40555789931 is 13998755504.

It is a happy number.

40555789931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40555789931 - 2¹⁰ = 40555788907 is a prime.

It is a super-2 number, since 2×40555789931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40555780931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277894965 + 20277894966.

It is an arithmetic number, because the mean of its divisors is an integer number (20277894966).

Almost surely, 2^40555789931 is an apocalyptic number.

40555789931 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555789931 is an equidigital number, since it uses as much as digits as its factorization.

40555789931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804000, while the sum is 56.

The spelling of 40555789931 in words is "forty billion, five hundred fifty-five million, seven hundred eighty-nine thousand, nine hundred thirty-one".