815120063 has 8 divisors (see below), whose sum is σ = 863323920. Its totient is φ = 766944640.

The previous prime is 815120039. The next prime is 815120071. The reversal of 815120063 is 360021518.

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 815120063 - 2¹² = 815115967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815123063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89693 + ... + 98361.

It is an arithmetic number, because the mean of its divisors is an integer number (107915490).

Almost surely, 2^815120063 is an apocalyptic number.

815120063 is a deficient number, since it is larger than the sum of its proper divisors (48203857).

815120063 is a wasteful number, since it uses less digits than its factorization.

815120063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14217.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 815120063 is about 28550.3075815305. The cubic root of 815120063 is about 934.1297298506.

The spelling of 815120063 in words is "eight hundred fifteen million, one hundred twenty thousand, sixty-three".