40349724881 has 2 divisors, whose sum is σ = 40349724882. Its totient is φ = 40349724880.

The previous prime is 40349724847. The next prime is 40349724901. The reversal of 40349724881 is 18842794304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24006403600 + 16343321281 = 154940^2 + 127841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40349724881 is a prime.

It is a super-2 number, since 2×40349724881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40349726881) 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, 20174862440 + 20174862441.

It is an arithmetic number, because the mean of its divisors is an integer number (20174862441).

Almost surely, 2^40349724881 is an apocalyptic number.

It is an amenable number.

40349724881 is a deficient number, since it is larger than the sum of its proper divisors (1).

40349724881 is an equidigital number, since it uses as much as digits as its factorization.

40349724881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 40349724881 in words is "forty billion, three hundred forty-nine million, seven hundred twenty-four thousand, eight hundred eighty-one".