64189481 has 8 divisors (see below), whose sum is σ = 67124160. Its totient is φ = 61266832.

The previous prime is 64189469. The next prime is 64189493. The reversal of 64189481 is 18498146.

It is an interprime number because it is at equal distance from previous prime (64189469) and next prime (64189493).

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 64189481 - 2¹⁰ = 64188457 is a prime.

It is a super-2 number, since 2×64189481² = 8240578942098722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64189421) 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, 8966 + ... + 14448.

It is an arithmetic number, because the mean of its divisors is an integer number (8390520).

Almost surely, 2^64189481 is an apocalyptic number.

It is an amenable number.

64189481 is a deficient number, since it is larger than the sum of its proper divisors (2934679).

64189481 is a wasteful number, since it uses less digits than its factorization.

64189481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015.

The product of its digits is 55296, while the sum is 41.

The square root of 64189481 is about 8011.8338100587. The cubic root of 64189481 is about 400.3943631498.

The spelling of 64189481 in words is "sixty-four million, one hundred eighty-nine thousand, four hundred eighty-one".