65136621011 has 16 divisors (see below), whose sum is σ = 81954343680. Its totient is φ = 50290152480.

The previous prime is 65136621007. The next prime is 65136621019. The reversal of 65136621011 is 11012663156.

It is a cyclic number.

It is not a de Polignac number, because 65136621011 - 2² = 65136621007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65136621019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3872021 + ... + 3888806.

It is an arithmetic number, because the mean of its divisors is an integer number (5122146480).

Almost surely, 2^65136621011 is an apocalyptic number.

65136621011 is a deficient number, since it is larger than the sum of its proper divisors (16817722669).

65136621011 is a wasteful number, since it uses less digits than its factorization.

65136621011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7760954.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 65136621011 in words is "sixty-five billion, one hundred thirty-six million, six hundred twenty-one thousand, eleven".