40309929281 has 2 divisors, whose sum is σ = 40309929282. Its totient is φ = 40309929280.

The previous prime is 40309929263. The next prime is 40309929299. The reversal of 40309929281 is 18292990304.

It is a balanced prime because it is at equal distance from previous prime (40309929263) and next prime (40309929299).

It can be written as a sum of positive squares in only one way, i.e., 37050090256 + 3259839025 = 192484^2 + 57095^2 .

It is a cyclic number.

It is not a de Polignac number, because 40309929281 - 2³⁰ = 39236187457 is a prime.

It is a super-2 number, since 2×40309929281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40309929481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20154964640 + 20154964641.

It is an arithmetic number, because the mean of its divisors is an integer number (20154964641).

Almost surely, 2^40309929281 is an apocalyptic number.

It is an amenable number.

40309929281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40309929281 is an equidigital number, since it uses as much as digits as its factorization.

40309929281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 40309929281 in words is "forty billion, three hundred nine million, nine hundred twenty-nine thousand, two hundred eighty-one".