64281995 has 4 divisors (see below), whose sum is σ = 77138400. Its totient is φ = 51425592.

The previous prime is 64281989. The next prime is 64282007. The reversal of 64281995 is 59918246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59918246 = 2 ⋅29959123.

It is a cyclic number.

It is not a de Polignac number, because 64281995 - 2⁴ = 64281979 is a prime.

It is a super-3 number, since 3×64281995³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6428195 + ... + 6428204.

It is an arithmetic number, because the mean of its divisors is an integer number (19284600).

Almost surely, 2^64281995 is an apocalyptic number.

64281995 is a deficient number, since it is larger than the sum of its proper divisors (12856405).

64281995 is a wasteful number, since it uses less digits than its factorization.

64281995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12856404.

The product of its digits is 155520, while the sum is 44.

The square root of 64281995 is about 8017.6053158035. The cubic root of 64281995 is about 400.5866288293.

The spelling of 64281995 in words is "sixty-four million, two hundred eighty-one thousand, nine hundred ninety-five".