40261939929 has 12 divisors (see below), whose sum is σ = 58162756132. Its totient is φ = 26838237600.

The previous prime is 40261939871. The next prime is 40261939931. The reversal of 40261939929 is 92993916204.

40261939929 is a `hidden beast` number, since 402 + 61 + 93 + 9 + 92 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22869605529 + 17392334400 = 151227^2 + 131880^2 .

It is not a de Polignac number, because 40261939929 - 2⁸ = 40261939673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40261939979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169702 + ... + 330639.

Almost surely, 2^40261939929 is an apocalyptic number.

It is an amenable number.

40261939929 is a deficient number, since it is larger than the sum of its proper divisors (17900816203).

40261939929 is a wasteful number, since it uses less digits than its factorization.

40261939929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509288 (or 509285 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The spelling of 40261939929 in words is "forty billion, two hundred sixty-one million, nine hundred thirty-nine thousand, nine hundred twenty-nine".