65145745 has 48 divisors (see below), whose sum is σ = 96402960. Its totient is φ = 42072576.

The previous prime is 65145739. The next prime is 65145757. The reversal of 65145745 is 54754156.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5531904 + 59613841 = 2352^2 + 7721^2 .

It is not a de Polignac number, because 65145745 - 2¹¹ = 65143697 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 376479 + ... + 376651.

It is an arithmetic number, because the mean of its divisors is an integer number (2008395).

Almost surely, 2^65145745 is an apocalyptic number.

It is an amenable number.

65145745 is a deficient number, since it is larger than the sum of its proper divisors (31257215).

65145745 is a wasteful number, since it uses less digits than its factorization.

65145745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 267 counting only the distinct ones).

The product of its digits is 84000, while the sum is 37.

The square root of 65145745 is about 8071.2914084426. The cubic root of 65145745 is about 402.3728646987.

The spelling of 65145745 in words is "sixty-five million, one hundred forty-five thousand, seven hundred forty-five".