65155601 has 16 divisors (see below), whose sum is σ = 76906368. Its totient is φ = 54038400.

The previous prime is 65155591. The next prime is 65155609. The reversal of 65155601 is 10655156.

It is a cyclic number.

It is not a de Polignac number, because 65155601 - 2⁶ = 65155537 is a prime.

It is a super-3 number, since 3×65155601³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (65155609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36731 + ... + 38463.

It is an arithmetic number, because the mean of its divisors is an integer number (4806648).

Almost surely, 2^65155601 is an apocalyptic number.

It is an amenable number.

65155601 is a deficient number, since it is larger than the sum of its proper divisors (11750767).

65155601 is a wasteful number, since it uses less digits than its factorization.

65155601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 65155601 is about 8071.9019443995. The cubic root of 65155601 is about 402.3931555454.

It can be divided in two parts, 65155 and 601, that added together give a palindrome (65756).

The spelling of 65155601 in words is "sixty-five million, one hundred fifty-five thousand, six hundred one".