64935683431 has 8 divisors (see below), whose sum is σ = 68356687280. Its totient is φ = 61515013248.

The previous prime is 64935683429. The next prime is 64935683443. The reversal of 64935683431 is 13438653946.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64935683431 - 2¹ = 64935683429 is a prime.

It is a super-2 number, since 2×64935683431² (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 (64935683531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382975 + ... + 525871.

It is an arithmetic number, because the mean of its divisors is an integer number (8544585910).

Almost surely, 2^64935683431 is an apocalyptic number.

64935683431 is a deficient number, since it is larger than the sum of its proper divisors (3421003849).

64935683431 is a wasteful number, since it uses less digits than its factorization.

64935683431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166833.

The product of its digits is 5598720, while the sum is 52.

The spelling of 64935683431 in words is "sixty-four billion, nine hundred thirty-five million, six hundred eighty-three thousand, four hundred thirty-one".