64897811 has 8 divisors (see below), whose sum is σ = 72134064. Its totient is φ = 57884320.

The previous prime is 64897801. The next prime is 64897829. The reversal of 64897811 is 11879846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64897811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64897801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55076 + ... + 56241.

It is an arithmetic number, because the mean of its divisors is an integer number (9016758).

Almost surely, 2^64897811 is an apocalyptic number.

64897811 is a deficient number, since it is larger than the sum of its proper divisors (7236253).

64897811 is a wasteful number, since it uses less digits than its factorization.

64897811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111381.

The product of its digits is 96768, while the sum is 44.

The square root of 64897811 is about 8055.9177627381. The cubic root of 64897811 is about 401.8617607565.

The spelling of 64897811 in words is "sixty-four million, eight hundred ninety-seven thousand, eight hundred eleven".