64240036565 has 24 divisors (see below), whose sum is σ = 77863016448. Its totient is φ = 50880138560.

The previous prime is 64240036547. The next prime is 64240036579. The reversal of 64240036565 is 56563004246.

It is a happy number.

64240036565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64240036565 - 2³² = 59945069269 is a prime.

It is a super-3 number, since 3×64240036565³ (a number of 33 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42514160 + ... + 42515670.

It is an arithmetic number, because the mean of its divisors is an integer number (3244292352).

Almost surely, 2^64240036565 is an apocalyptic number.

It is an amenable number.

64240036565 is a deficient number, since it is larger than the sum of its proper divisors (13622979883).

64240036565 is a wasteful number, since it uses less digits than its factorization.

64240036565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 64240036565 in words is "sixty-four billion, two hundred forty million, thirty-six thousand, five hundred sixty-five".