64011995 has 4 divisors (see below), whose sum is σ = 76814400. Its totient is φ = 51209592.

The previous prime is 64011989. The next prime is 64012009. The reversal of 64011995 is 59911046.

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-64011995 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6401195 + ... + 6401204.

It is an arithmetic number, because the mean of its divisors is an integer number (19203600).

Almost surely, 2^64011995 is an apocalyptic number.

64011995 is a deficient number, since it is larger than the sum of its proper divisors (12802405).

64011995 is a wasteful number, since it uses less digits than its factorization.

64011995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12802404.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 64011995 is about 8000.7496523763. The cubic root of 64011995 is about 400.0249880223.

The spelling of 64011995 in words is "sixty-four million, eleven thousand, nine hundred ninety-five".