65111541049 has 4 divisors (see below), whose sum is σ = 65112157264. Its totient is φ = 65110924836.

The previous prime is 65111541029. The next prime is 65111541059. The reversal of 65111541049 is 94014511156.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 65111541049 - 2⁵ = 65111541017 is a prime.

It is a super-2 number, since 2×65111541049² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65111540999 and 65111541017.

It is not an unprimeable number, because it can be changed into a prime (65111541029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104967 + ... + 375820.

It is an arithmetic number, because the mean of its divisors is an integer number (16278039316).

Almost surely, 2^65111541049 is an apocalyptic number.

It is an amenable number.

65111541049 is a deficient number, since it is larger than the sum of its proper divisors (616215).

65111541049 is a wasteful number, since it uses less digits than its factorization.

65111541049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616214.

The product of its (nonzero) digits is 21600, while the sum is 37.

The spelling of 65111541049 in words is "sixty-five billion, one hundred eleven million, five hundred forty-one thousand, forty-nine".