40191749246881 has 2 divisors, whose sum is σ = 40191749246882. Its totient is φ = 40191749246880.

The previous prime is 40191749246849. The next prime is 40191749246921. The reversal of 40191749246881 is 18864294719104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39555495747856 + 636253499025 = 6289316^2 + 797655^2 .

It is a cyclic number.

It is not a de Polignac number, because 40191749246881 - 2⁵ = 40191749246849 is a prime.

It is a super-2 number, since 2×40191749246881² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40191749241881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20095874623440 + 20095874623441.

It is an arithmetic number, because the mean of its divisors is an integer number (20095874623441).

Almost surely, 2^{40191749246881} is an apocalyptic number.

It is an amenable number.

40191749246881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40191749246881 is an equidigital number, since it uses as much as digits as its factorization.

40191749246881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 40191749246881 in words is "forty trillion, one hundred ninety-one billion, seven hundred forty-nine million, two hundred forty-six thousand, eight hundred eighty-one".