40371916549 has 2 divisors, whose sum is σ = 40371916550. Its totient is φ = 40371916548.

The previous prime is 40371916499. The next prime is 40371916619. The reversal of 40371916549 is 94561917304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37092063649 + 3279852900 = 192593^2 + 57270^2 .

It is a cyclic number.

It is not a de Polignac number, because 40371916549 - 2²⁷ = 40237698821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40371916049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20185958274 + 20185958275.

It is an arithmetic number, because the mean of its divisors is an integer number (20185958275).

Almost surely, 2^40371916549 is an apocalyptic number.

It is an amenable number.

40371916549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40371916549 is an equidigital number, since it uses as much as digits as its factorization.

40371916549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 40371916549 in words is "forty billion, three hundred seventy-one million, nine hundred sixteen thousand, five hundred forty-nine".