42808906312691 has 8 divisors (see below), whose sum is σ = 43656600156624. Its totient is φ = 41962693158880.

The previous prime is 42808906312687. The next prime is 42808906312703. The reversal of 42808906312691 is 19621360980824.

It is a happy number.

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 42808906312691 - 2² = 42808906312687 is a prime.

It is a super-4 number, since 4×42808906312691⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42808906312691.

It is not an unprimeable number, because it can be changed into a prime (42808906312681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370114136 + ... + 370229781.

It is an arithmetic number, because the mean of its divisors is an integer number (5457075019578).

Almost surely, 2^{42808906312691} is an apocalyptic number.

42808906312691 is a deficient number, since it is larger than the sum of its proper divisors (847693843933).

42808906312691 is a wasteful number, since it uses less digits than its factorization.

42808906312691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740345061.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 42808906312691 in words is "forty-two trillion, eight hundred eight billion, nine hundred six million, three hundred twelve thousand, six hundred ninety-one".