64621611211 has 4 divisors (see below), whose sum is σ = 64624637952. Its totient is φ = 64618584472.

The previous prime is 64621611167. The next prime is 64621611217. The reversal of 64621611211 is 11211612646.

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 64621611211 - 2⁹ = 64621610699 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64621611217) 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, 1481116 + ... + 1524121.

It is an arithmetic number, because the mean of its divisors is an integer number (16156159488).

Almost surely, 2^64621611211 is an apocalyptic number.

64621611211 is a deficient number, since it is larger than the sum of its proper divisors (3026741).

64621611211 is a wasteful number, since it uses less digits than its factorization.

64621611211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026740.

The product of its digits is 3456, while the sum is 31.

The spelling of 64621611211 in words is "sixty-four billion, six hundred twenty-one million, six hundred eleven thousand, two hundred eleven".