65136145 has 4 divisors (see below), whose sum is σ = 78163380. Its totient is φ = 52108912.

The previous prime is 65136139. The next prime is 65136173. The reversal of 65136145 is 54163156.

65136145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46335249 + 18800896 = 6807^2 + 4336^2 .

It is a cyclic number.

It is not a de Polignac number, because 65136145 - 2⁷ = 65136017 is a prime.

It is a super-2 number, since 2×65136145² = 8485434770922050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6513610 + ... + 6513619.

It is an arithmetic number, because the mean of its divisors is an integer number (19540845).

Almost surely, 2^65136145 is an apocalyptic number.

It is an amenable number.

65136145 is a deficient number, since it is larger than the sum of its proper divisors (13027235).

65136145 is a wasteful number, since it uses less digits than its factorization.

65136145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027234.

The product of its digits is 10800, while the sum is 31.

The square root of 65136145 is about 8070.6966861604. The cubic root of 65136145 is about 402.3530989193.

The spelling of 65136145 in words is "sixty-five million, one hundred thirty-six thousand, one hundred forty-five".