65137645 has 8 divisors (see below), whose sum is σ = 78215904. Its totient is φ = 52076304.

The previous prime is 65137619. The next prime is 65137663. The reversal of 65137645 is 54673156.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65137645 - 2⁹ = 65137133 is a prime.

It is a super-3 number, since 3×65137645³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 7 ways as a sum of consecutive naturals, for example, 6922 + ... + 13348.

It is an arithmetic number, because the mean of its divisors is an integer number (9776988).

Almost surely, 2^65137645 is an apocalyptic number.

It is an amenable number.

65137645 is a deficient number, since it is larger than the sum of its proper divisors (13078259).

65137645 is a wasteful number, since it uses less digits than its factorization.

65137645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8459.

The product of its digits is 75600, while the sum is 37.

The square root of 65137645 is about 8070.7896144058. The cubic root of 65137645 is about 402.3561874504.

The spelling of 65137645 in words is "sixty-five million, one hundred thirty-seven thousand, six hundred forty-five".