64606512473081 has 16 divisors (see below), whose sum is σ = 64924439342400. Its totient is φ = 64289012014080.

The previous prime is 64606512472991. The next prime is 64606512473143. The reversal of 64606512473081 is 18037421560646.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64606512473081 - 2¹⁰ = 64606512472057 is a prime.

It is a super-2 number, since 2×64606512473081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64606512473981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3113106401 + ... + 3113127153.

It is an arithmetic number, because the mean of its divisors is an integer number (4057777458900).

Almost surely, 2^{64606512473081} is an apocalyptic number.

It is an amenable number.

64606512473081 is a deficient number, since it is larger than the sum of its proper divisors (317926869319).

64606512473081 is a wasteful number, since it uses less digits than its factorization.

64606512473081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30296.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 64606512473081 in words is "sixty-four trillion, six hundred six billion, five hundred twelve million, four hundred seventy-three thousand, eighty-one".