64123345115 has 4 divisors (see below), whose sum is σ = 76948014144. Its totient is φ = 51298676088.

The previous prime is 64123345087. The next prime is 64123345123. The reversal of 64123345115 is 51154332146.

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

It is a cyclic number.

It is not a de Polignac number, because 64123345115 - 2¹⁸ = 64123082971 is a prime.

It is a super-2 number, since 2×64123345115² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6412334507 + ... + 6412334516.

It is an arithmetic number, because the mean of its divisors is an integer number (19237003536).

Almost surely, 2^64123345115 is an apocalyptic number.

64123345115 is a deficient number, since it is larger than the sum of its proper divisors (12824669029).

64123345115 is a wasteful number, since it uses less digits than its factorization.

64123345115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12824669028.

The product of its digits is 43200, while the sum is 35.

The spelling of 64123345115 in words is "sixty-four billion, one hundred twenty-three million, three hundred forty-five thousand, one hundred fifteen".