64981795 has 4 divisors (see below), whose sum is σ = 77978160. Its totient is φ = 51985432.

The previous prime is 64981789. The next prime is 64981799. The reversal of 64981795 is 59718946.

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 64981795 - 2²¹ = 62884643 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64981799) 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, 6498175 + ... + 6498184.

It is an arithmetic number, because the mean of its divisors is an integer number (19494540).

Almost surely, 2^64981795 is an apocalyptic number.

64981795 is a deficient number, since it is larger than the sum of its proper divisors (12996365).

64981795 is a wasteful number, since it uses less digits than its factorization.

64981795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12996364.

The product of its digits is 544320, while the sum is 49.

The square root of 64981795 is about 8061.1286430623. The cubic root of 64981795 is about 402.0350352706.

The spelling of 64981795 in words is "sixty-four million, nine hundred eighty-one thousand, seven hundred ninety-five".