64037872081 has 8 divisors (see below), whose sum is σ = 64369298304. Its totient is φ = 63707145840.

The previous prime is 64037872069. The next prime is 64037872097. The reversal of 64037872081 is 18027873046.

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 64037872081 - 2⁵ = 64037872049 is a prime.

It is a super-2 number, since 2×64037872081² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64037812081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8946 + ... + 357988.

It is an arithmetic number, because the mean of its divisors is an integer number (8046162288).

Almost surely, 2^64037872081 is an apocalyptic number.

It is an amenable number.

64037872081 is a deficient number, since it is larger than the sum of its proper divisors (331426223).

64037872081 is a wasteful number, since it uses less digits than its factorization.

64037872081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349991.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 64037872081 in words is "sixty-four billion, thirty-seven million, eight hundred seventy-two thousand, eighty-one".