6451085065 has 8 divisors (see below), whose sum is σ = 7742213640. Its totient is φ = 5160260352.

The previous prime is 6451085059. The next prime is 6451085071. The reversal of 6451085065 is 5605801546.

It is an interprime number because it is at equal distance from previous prime (6451085059) and next prime (6451085071).

It can be written as a sum of positive squares in 4 ways, for example, as 4465847929 + 1985237136 = 66827^2 + 44556^2 .

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 6451085065 - 2²¹ = 6448987913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26304 + ... + 116593.

It is an arithmetic number, because the mean of its divisors is an integer number (967776705).

Almost surely, 2^6451085065 is an apocalyptic number.

It is an amenable number.

6451085065 is a deficient number, since it is larger than the sum of its proper divisors (1291128575).

6451085065 is a wasteful number, since it uses less digits than its factorization.

6451085065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151931.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 6451085065 is about 80318.6470565833. The cubic root of 6451085065 is about 1861.5623617903.

The spelling of 6451085065 in words is "six billion, four hundred fifty-one million, eighty-five thousand, sixty-five".