2864238651691 has 4 divisors (see below), whose sum is σ = 2864322184192. Its totient is φ = 2864155119192.

The previous prime is 2864238651689. The next prime is 2864238651733. The reversal of 2864238651691 is 1961568324682.

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 2864238651691 - 2¹ = 2864238651689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2864238751691) 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 3 ways as a sum of consecutive naturals, for example, 41714796 + ... + 41783401.

It is an arithmetic number, because the mean of its divisors is an integer number (716080546048).

Almost surely, 2^{2864238651691} is an apocalyptic number.

2864238651691 is a deficient number, since it is larger than the sum of its proper divisors (83532501).

2864238651691 is an equidigital number, since it uses as much as digits as its factorization.

2864238651691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83532500.

The product of its digits is 29859840, while the sum is 61.

The spelling of 2864238651691 in words is "two trillion, eight hundred sixty-four billion, two hundred thirty-eight million, six hundred fifty-one thousand, six hundred ninety-one".