64697270843 has 4 divisors (see below), whose sum is σ = 64785535248. Its totient is φ = 64609006440.

The previous prime is 64697270831. The next prime is 64697270849. The reversal of 64697270843 is 34807279646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64697270843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64697270849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44131103 + ... + 44132568.

It is an arithmetic number, because the mean of its divisors is an integer number (16196383812).

Almost surely, 2^64697270843 is an apocalyptic number.

64697270843 is a deficient number, since it is larger than the sum of its proper divisors (88264405).

64697270843 is an equidigital number, since it uses as much as digits as its factorization.

64697270843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88264404.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 64697270843 in words is "sixty-four billion, six hundred ninety-seven million, two hundred seventy thousand, eight hundred forty-three".