64629686311 has 4 divisors (see below), whose sum is σ = 64968061824. Its totient is φ = 64291310800.

The previous prime is 64629686287. The next prime is 64629686327. The reversal of 64629686311 is 11368692646.

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 64629686311 - 2¹⁷ = 64629555239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64629686371) 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, 169187470 + ... + 169187851.

It is an arithmetic number, because the mean of its divisors is an integer number (16242015456).

Almost surely, 2^64629686311 is an apocalyptic number.

64629686311 is a deficient number, since it is larger than the sum of its proper divisors (338375513).

64629686311 is a wasteful number, since it uses less digits than its factorization.

64629686311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338375512.

The product of its digits is 2239488, while the sum is 52.

The spelling of 64629686311 in words is "sixty-four billion, six hundred twenty-nine million, six hundred eighty-six thousand, three hundred eleven".