64115545 has 16 divisors (see below), whose sum is σ = 83719440. Its totient is φ = 46854144.

The previous prime is 64115539. The next prime is 64115573. The reversal of 64115545 is 54551146.

It can be written as a sum of positive squares in 8 ways, for example, as 51529 + 64064016 = 227^2 + 8004^2 .

It is a cyclic number.

It is not a de Polignac number, because 64115545 - 2⁷ = 64115417 is a prime.

It is a super-2 number, since 2×64115545² = 8221606221294050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1221 + ... + 11389.

It is an arithmetic number, because the mean of its divisors is an integer number (5232465).

Almost surely, 2^64115545 is an apocalyptic number.

64115545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64115545 is a deficient number, since it is larger than the sum of its proper divisors (19603895).

64115545 is a wasteful number, since it uses less digits than its factorization.

64115545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284.

The product of its digits is 12000, while the sum is 31.

The square root of 64115545 is about 8007.2183060037. The cubic root of 64115545 is about 400.2405740313.

The spelling of 64115545 in words is "sixty-four million, one hundred fifteen thousand, five hundred forty-five".