64115575 has 12 divisors (see below), whose sum is σ = 80808568. Its totient is φ = 50450400.

The previous prime is 64115573. The next prime is 64115593. The reversal of 64115575 is 57551146.

It is not a de Polignac number, because 64115575 - 2¹ = 64115573 is a prime.

It is a super-2 number, since 2×64115575² = 8221613915161250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64115575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64115573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19497 + ... + 22546.

Almost surely, 2^64115575 is an apocalyptic number.

64115575 is a deficient number, since it is larger than the sum of its proper divisors (16692993).

64115575 is a wasteful number, since it uses less digits than its factorization.

64115575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42114 (or 42109 counting only the distinct ones).

The product of its digits is 21000, while the sum is 34.

The square root of 64115575 is about 8007.2201793132. The cubic root of 64115575 is about 400.2406364562.

The spelling of 64115575 in words is "sixty-four million, one hundred fifteen thousand, five hundred seventy-five".