40434189691 has 16 divisors (see below), whose sum is σ = 47003258880. Its totient is φ = 34063548480.

The previous prime is 40434189683. The next prime is 40434189703. The reversal of 40434189691 is 19698143404.

It is a cyclic number.

It is not a de Polignac number, because 40434189691 - 2³ = 40434189683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40434189671) 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 15 ways as a sum of consecutive naturals, for example, 3778150 + ... + 3788836.

It is an arithmetic number, because the mean of its divisors is an integer number (2937703680).

Almost surely, 2^40434189691 is an apocalyptic number.

40434189691 is a deficient number, since it is larger than the sum of its proper divisors (6569069189).

40434189691 is a wasteful number, since it uses less digits than its factorization.

40434189691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19914.

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 40434189691 in words is "forty billion, four hundred thirty-four million, one hundred eighty-nine thousand, six hundred ninety-one".