40400004101 has 2 divisors, whose sum is σ = 40400004102. Its totient is φ = 40400004100.

The previous prime is 40400004079. The next prime is 40400004167. The reversal of 40400004101 is 10140000404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39452287876 + 947716225 = 198626^2 + 30785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40400004101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40400004191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200002050 + 20200002051.

It is an arithmetic number, because the mean of its divisors is an integer number (20200002051).

Almost surely, 2^40400004101 is an apocalyptic number.

It is an amenable number.

40400004101 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400004101 is an equidigital number, since it uses as much as digits as its factorization.

40400004101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 40400004101 its reverse (10140000404), we get a palindrome (50540004505).

The spelling of 40400004101 in words is "forty billion, four hundred million, four thousand, one hundred one".