65234889631 has 4 divisors (see below), whose sum is σ = 65507839200. Its totient is φ = 64961940064.

The previous prime is 65234889613. The next prime is 65234889647. The reversal of 65234889631 is 13698843256.

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 65234889631 - 2⁹ = 65234889119 is a prime.

It is a super-2 number, since 2×65234889631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65234889691) 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, 136474426 + ... + 136474903.

It is an arithmetic number, because the mean of its divisors is an integer number (16376959800).

Almost surely, 2^65234889631 is an apocalyptic number.

65234889631 is a deficient number, since it is larger than the sum of its proper divisors (272949569).

65234889631 is a wasteful number, since it uses less digits than its factorization.

65234889631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272949568.

The product of its digits is 7464960, while the sum is 55.

The spelling of 65234889631 in words is "sixty-five billion, two hundred thirty-four million, eight hundred eighty-nine thousand, six hundred thirty-one".