65021564 has 6 divisors (see below), whose sum is σ = 113787744. Its totient is φ = 32510780.

The previous prime is 65021563. The next prime is 65021569. The reversal of 65021564 is 46512056.

65021564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65021563) 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 as a sum of consecutive naturals, namely, 8127692 + ... + 8127699.

It is an arithmetic number, because the mean of its divisors is an integer number (18964624).

Almost surely, 2^65021564 is an apocalyptic number.

It is an amenable number.

65021564 is a deficient number, since it is larger than the sum of its proper divisors (48766180).

65021564 is a wasteful number, since it uses less digits than its factorization.

65021564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16255395 (or 16255393 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 65021564 is about 8063.5949799082. The cubic root of 65021564 is about 402.1170339840.

The spelling of 65021564 in words is "sixty-five million, twenty-one thousand, five hundred sixty-four".