40429491291 has 48 divisors (see below), whose sum is σ = 68739840000. Its totient is φ = 22886467632.

The previous prime is 40429491251. The next prime is 40429491337. The reversal of 40429491291 is 19219492404.

It is a happy number.

It is not a de Polignac number, because 40429491291 - 2⁹ = 40429490779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40429491251) 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 in 47 ways as a sum of consecutive naturals, for example, 269110 + ... + 391508.

It is an arithmetic number, because the mean of its divisors is an integer number (1432080000).

Almost surely, 2^40429491291 is an apocalyptic number.

40429491291 is a deficient number, since it is larger than the sum of its proper divisors (28310348709).

40429491291 is a wasteful number, since it uses less digits than its factorization.

40429491291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122533 (or 122516 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 40429491291 in words is "forty billion, four hundred twenty-nine million, four hundred ninety-one thousand, two hundred ninety-one".