64201865 has 32 divisors (see below), whose sum is σ = 95558400. Its totient is φ = 40322304.

The previous prime is 64201861. The next prime is 64201873. The reversal of 64201865 is 56810246.

64201865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64201865 - 2² = 64201861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64201861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67322 + ... + 68268.

It is an arithmetic number, because the mean of its divisors is an integer number (2986200).

Almost surely, 2^64201865 is an apocalyptic number.

64201865 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64201865 is a deficient number, since it is larger than the sum of its proper divisors (31356535).

64201865 is a wasteful number, since it uses less digits than its factorization.

64201865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 64201865 is about 8012.6066295557. The cubic root of 64201865 is about 400.4201106964.

The spelling of 64201865 in words is "sixty-four million, two hundred one thousand, eight hundred sixty-five".