65161297419 has 4 divisors (see below), whose sum is σ = 86881729896. Its totient is φ = 43440864944.

The previous prime is 65161297393. The next prime is 65161297429. The reversal of 65161297419 is 91479216156.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65161297419 - 2⁸ = 65161297163 is a prime.

It is a super-2 number, since 2×65161297419² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65161297429) 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, 10860216234 + ... + 10860216239.

It is an arithmetic number, because the mean of its divisors is an integer number (21720432474).

Almost surely, 2^65161297419 is an apocalyptic number.

65161297419 is a deficient number, since it is larger than the sum of its proper divisors (21720432477).

65161297419 is a wasteful number, since it uses less digits than its factorization.

65161297419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21720432476.

The product of its digits is 816480, while the sum is 51.

The spelling of 65161297419 in words is "sixty-five billion, one hundred sixty-one million, two hundred ninety-seven thousand, four hundred nineteen".