40999981247 has 2 divisors, whose sum is σ = 40999981248. Its totient is φ = 40999981246.

The previous prime is 40999981241. The next prime is 40999981331. The reversal of 40999981247 is 74218999904.

40999981247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40999981247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40999981247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40999981241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20499990623 + 20499990624.

It is an arithmetic number, because the mean of its divisors is an integer number (20499990624).

Almost surely, 2^40999981247 is an apocalyptic number.

40999981247 is a deficient number, since it is larger than the sum of its proper divisors (1).

40999981247 is an equidigital number, since it uses as much as digits as its factorization.

40999981247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 40999981247 in words is "forty billion, nine hundred ninety-nine million, nine hundred eighty-one thousand, two hundred forty-seven".