1215718016 has 32 divisors (see below), whose sum is σ = 2478273600. Its totient is φ = 593720064.

The previous prime is 1215718013. The next prime is 1215718033. The reversal of 1215718016 is 6108175121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (1215718013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104936 + ... + 115943.

It is an arithmetic number, because the mean of its divisors is an integer number (77446050).

Almost surely, 2^1215718016 is an apocalyptic number.

1215718016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1215718016 is an abundant number, since it is smaller than the sum of its proper divisors (1262555584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215718016 is an equidigital number, since it uses as much as digits as its factorization.

1215718016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220936 (or 220924 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 32.

The square root of 1215718016 is about 34867.1480910039. The cubic root of 1215718016 is about 1067.2781480040.

The spelling of 1215718016 in words is "one billion, two hundred fifteen million, seven hundred eighteen thousand, sixteen".