64481943 has 8 divisors (see below), whose sum is σ = 86050800. Its totient is φ = 42950528.

The previous prime is 64481909. The next prime is 64481947. The reversal of 64481943 is 34918446.

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 64481943 - 2²² = 60287639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64481947) 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, 5058 + ... + 12431.

It is an arithmetic number, because the mean of its divisors is an integer number (10756350).

Almost surely, 2^64481943 is an apocalyptic number.

64481943 is a deficient number, since it is larger than the sum of its proper divisors (21568857).

64481943 is a wasteful number, since it uses less digits than its factorization.

64481943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18721.

The product of its digits is 82944, while the sum is 39.

The square root of 64481943 is about 8030.0649436975. The cubic root of 64481943 is about 401.0015381272.

The spelling of 64481943 in words is "sixty-four million, four hundred eighty-one thousand, nine hundred forty-three".