64916481 has 8 divisors (see below), whose sum is σ = 98920384. Its totient is φ = 37095120.

The previous prime is 64916477. The next prime is 64916519. The reversal of 64916481 is 18461946.

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

It is not a de Polignac number, because 64916481 - 2² = 64916477 is a prime.

It is a super-2 number, since 2×64916481² = 8428299010846722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64916581) 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, 1545610 + ... + 1545651.

It is an arithmetic number, because the mean of its divisors is an integer number (12365048).

Almost surely, 2^64916481 is an apocalyptic number.

It is an amenable number.

64916481 is a deficient number, since it is larger than the sum of its proper divisors (34003903).

64916481 is a wasteful number, since it uses less digits than its factorization.

64916481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091271.

The product of its digits is 41472, while the sum is 39.

The square root of 64916481 is about 8057.0764548935. The cubic root of 64916481 is about 401.9002933336.

The spelling of 64916481 in words is "sixty-four million, nine hundred sixteen thousand, four hundred eighty-one".