64463861 has 24 divisors (see below), whose sum is σ = 82353600. Its totient is φ = 49896000.

The previous prime is 64463831. The next prime is 64463873. The reversal of 64463861 is 16836446.

It is not a de Polignac number, because 64463861 - 2¹⁴ = 64447477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64463821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106961 + ... + 107561.

It is an arithmetic number, because the mean of its divisors is an integer number (3431400).

Almost surely, 2^64463861 is an apocalyptic number.

It is an amenable number.

64463861 is a deficient number, since it is larger than the sum of its proper divisors (17889739).

64463861 is a wasteful number, since it uses less digits than its factorization.

64463861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 818 counting only the distinct ones).

The product of its digits is 82944, while the sum is 38.

The square root of 64463861 is about 8028.9389709974. The cubic root of 64463861 is about 400.9640517274.

The spelling of 64463861 in words is "sixty-four million, four hundred sixty-three thousand, eight hundred sixty-one".