40381037881 has 2 divisors, whose sum is σ = 40381037882. Its totient is φ = 40381037880.

The previous prime is 40381037869. The next prime is 40381037909. The reversal of 40381037881 is 18873018304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32142752656 + 8238285225 = 179284^2 + 90765^2 .

It is a cyclic number.

It is not a de Polignac number, because 40381037881 - 2¹⁵ = 40381005113 is a prime.

It is a super-2 number, since 2×40381037881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40381031881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20190518940 + 20190518941.

It is an arithmetic number, because the mean of its divisors is an integer number (20190518941).

Almost surely, 2^40381037881 is an apocalyptic number.

It is an amenable number.

40381037881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40381037881 is an equidigital number, since it uses as much as digits as its factorization.

40381037881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 40381037881 in words is "forty billion, three hundred eighty-one million, thirty-seven thousand, eight hundred eighty-one".