64156818115 has 16 divisors (see below), whose sum is σ = 82933867296. Its totient is φ = 47363904000.

The previous prime is 64156818113. The next prime is 64156818119. The reversal of 64156818115 is 51181865146.

64156818115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64156818115 - 2¹ = 64156818113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64156818113) 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, 93915 + ... + 370315.

It is an arithmetic number, because the mean of its divisors is an integer number (5183366706).

Almost surely, 2^64156818115 is an apocalyptic number.

64156818115 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64156818115 is a deficient number, since it is larger than the sum of its proper divisors (18777049181).

64156818115 is a wasteful number, since it uses less digits than its factorization.

64156818115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279990.

The product of its digits is 230400, while the sum is 46.

The spelling of 64156818115 in words is "sixty-four billion, one hundred fifty-six million, eight hundred eighteen thousand, one hundred fifteen".