65161553 has 4 divisors (see below), whose sum is σ = 67994688. Its totient is φ = 62328420.

The previous prime is 65161543. The next prime is 65161559. The reversal of 65161553 is 35516156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65161553 - 2⁶ = 65161489 is a prime.

It is a super-3 number, since 3×65161553³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65161559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416533 + ... + 1416578.

It is an arithmetic number, because the mean of its divisors is an integer number (16998672).

Almost surely, 2^65161553 is an apocalyptic number.

It is an amenable number.

65161553 is a deficient number, since it is larger than the sum of its proper divisors (2833135).

65161553 is a wasteful number, since it uses less digits than its factorization.

65161553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833134.

The product of its digits is 13500, while the sum is 32.

The square root of 65161553 is about 8072.2706223218. The cubic root of 65161553 is about 402.4054081177.

The spelling of 65161553 in words is "sixty-five million, one hundred sixty-one thousand, five hundred fifty-three".