40400704081 has 2 divisors, whose sum is σ = 40400704082. Its totient is φ = 40400704080.

The previous prime is 40400703989. The next prime is 40400704087. The reversal of 40400704081 is 18040700404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28860573456 + 11540130625 = 169884^2 + 107425^2 .

It is a cyclic number.

It is not a de Polignac number, because 40400704081 - 2⁷ = 40400703953 is a prime.

It is a super-2 number, since 2×40400704081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40400704087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200352040 + 20200352041.

It is an arithmetic number, because the mean of its divisors is an integer number (20200352041).

Almost surely, 2^40400704081 is an apocalyptic number.

It is an amenable number.

40400704081 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400704081 is an equidigital number, since it uses as much as digits as its factorization.

40400704081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 28.

The spelling of 40400704081 in words is "forty billion, four hundred million, seven hundred four thousand, eighty-one".