40390208125691 has 8 divisors (see below), whose sum is σ = 40820346539280. Its totient is φ = 39960350212608.

The previous prime is 40390208125639. The next prime is 40390208125721. The reversal of 40390208125691 is 19652180209304.

40390208125691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40390208125691 - 2¹⁰ = 40390208124667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40390208125991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69835601 + ... + 70411586.

It is an arithmetic number, because the mean of its divisors is an integer number (5102543317410).

Almost surely, 2^{40390208125691} is an apocalyptic number.

40390208125691 is a deficient number, since it is larger than the sum of its proper divisors (430138413589).

40390208125691 is a wasteful number, since it uses less digits than its factorization.

40390208125691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140250253.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 40390208125691 in words is "forty trillion, three hundred ninety billion, two hundred eight million, one hundred twenty-five thousand, six hundred ninety-one".