64789081 has 8 divisors (see below), whose sum is σ = 74586240. Its totient is φ = 55127328.

The previous prime is 64789073. The next prime is 64789093. The reversal of 64789081 is 18098746.

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 64789081 - 2³ = 64789073 is a prime.

It is a super-2 number, since 2×64789081² = 8395250033649122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64789051) 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, 32821 + ... + 34738.

It is an arithmetic number, because the mean of its divisors is an integer number (9323280).

Almost surely, 2^64789081 is an apocalyptic number.

It is an amenable number.

64789081 is a deficient number, since it is larger than the sum of its proper divisors (9797159).

64789081 is a wasteful number, since it uses less digits than its factorization.

64789081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67703.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 64789081 is about 8049.1664785865. The cubic root of 64789081 is about 401.6372084784.

The spelling of 64789081 in words is "sixty-four million, seven hundred eighty-nine thousand, eighty-one".