65055111881 has 4 divisors (see below), whose sum is σ = 65171907972. Its totient is φ = 64938315792.

The previous prime is 65055111871. The next prime is 65055111893. The reversal of 65055111881 is 18811155056.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16790976400 + 48264135481 = 129580^2 + 219691^2 .

It is a cyclic number.

It is not a de Polignac number, because 65055111881 - 2²² = 65050917577 is a prime.

It is a super-2 number, since 2×65055111881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65055111871) 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, 58397210 + ... + 58398323.

It is an arithmetic number, because the mean of its divisors is an integer number (16292976993).

Almost surely, 2^65055111881 is an apocalyptic number.

It is an amenable number.

65055111881 is a deficient number, since it is larger than the sum of its proper divisors (116796091).

65055111881 is a wasteful number, since it uses less digits than its factorization.

65055111881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116796090.

The product of its (nonzero) digits is 48000, while the sum is 41.

The spelling of 65055111881 in words is "sixty-five billion, fifty-five million, one hundred eleven thousand, eight hundred eighty-one".