64115851 has 4 divisors (see below), whose sum is σ = 65072872. Its totient is φ = 63158832.

The previous prime is 64115803. The next prime is 64115879. The reversal of 64115851 is 15851146.

64115851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64115851 is a prime.

It is a super-2 number, since 2×64115851² = 8221684698908402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64116851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478410 + ... + 478543.

It is an arithmetic number, because the mean of its divisors is an integer number (16268218).

Almost surely, 2^64115851 is an apocalyptic number.

64115851 is a deficient number, since it is larger than the sum of its proper divisors (957021).

64115851 is an equidigital number, since it uses as much as digits as its factorization.

64115851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957020.

The product of its digits is 4800, while the sum is 31.

The square root of 64115851 is about 8007.2374137401. The cubic root of 64115851 is about 400.2412107642.

Adding to 64115851 its reverse (15851146), we get a palindrome (79966997).

The spelling of 64115851 in words is "sixty-four million, one hundred fifteen thousand, eight hundred fifty-one".