65140555 has 8 divisors (see below), whose sum is σ = 78621552. Its totient is φ = 51810528.

The previous prime is 65140529. The next prime is 65140561. The reversal of 65140555 is 55504156.

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 65140555 - 2¹³ = 65132363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36789 + ... + 38518.

It is an arithmetic number, because the mean of its divisors is an integer number (9827694).

Almost surely, 2^65140555 is an apocalyptic number.

65140555 is a deficient number, since it is larger than the sum of its proper divisors (13480997).

65140555 is a wasteful number, since it uses less digits than its factorization.

65140555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75485.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 65140555 is about 8070.9698921505. The cubic root of 65140555 is about 402.3621790654.

The spelling of 65140555 in words is "sixty-five million, one hundred forty thousand, five hundred fifty-five".