42786400665599 has 4 divisors (see below), whose sum is σ = 42786728769264. Its totient is φ = 42786072561936.

The previous prime is 42786400665563. The next prime is 42786400665637. The reversal of 42786400665599 is 99556600468724.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42786400665599 - 2⁸ = 42786400665343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42786400665529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163856147 + ... + 164117060.

It is an arithmetic number, because the mean of its divisors is an integer number (10696682192316).

Almost surely, 2^{42786400665599} is an apocalyptic number.

42786400665599 is a deficient number, since it is larger than the sum of its proper divisors (328103665).

42786400665599 is a wasteful number, since it uses less digits than its factorization.

42786400665599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328103664.

The product of its (nonzero) digits is 783820800, while the sum is 71.

The spelling of 42786400665599 in words is "forty-two trillion, seven hundred eighty-six billion, four hundred million, six hundred sixty-five thousand, five hundred ninety-nine".