64188342271 has 4 divisors (see below), whose sum is σ = 64188866952. Its totient is φ = 64187817592.

The previous prime is 64188342269. The next prime is 64188342299. The reversal of 64188342271 is 17224388146.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64188342271 - 2¹ = 64188342269 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 (64188342871) 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, 29061 + ... + 359473.

It is an arithmetic number, because the mean of its divisors is an integer number (16047216738).

Almost surely, 2^64188342271 is an apocalyptic number.

64188342271 is a deficient number, since it is larger than the sum of its proper divisors (524681).

64188342271 is a wasteful number, since it uses less digits than its factorization.

64188342271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524680.

The product of its digits is 516096, while the sum is 46.

The spelling of 64188342271 in words is "sixty-four billion, one hundred eighty-eight million, three hundred forty-two thousand, two hundred seventy-one".