40981912849 has 2 divisors, whose sum is σ = 40981912850. Its totient is φ = 40981912848.

The previous prime is 40981912837. The next prime is 40981912883. The reversal of 40981912849 is 94821918904.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39335582224 + 1646330625 = 198332^2 + 40575^2 .

It is a cyclic number.

It is not a de Polignac number, because 40981912849 - 2¹⁹ = 40981388561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40981912849.

It is not a weakly prime, because it can be changed into another prime (40981912819) 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, 20490956424 + 20490956425.

It is an arithmetic number, because the mean of its divisors is an integer number (20490956425).

Almost surely, 2^40981912849 is an apocalyptic number.

It is an amenable number.

40981912849 is a deficient number, since it is larger than the sum of its proper divisors (1).

40981912849 is an equidigital number, since it uses as much as digits as its factorization.

40981912849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 40981912849 in words is "forty billion, nine hundred eighty-one million, nine hundred twelve thousand, eight hundred forty-nine".