1218015064 has 64 divisors (see below), whose sum is σ = 2757484800. Its totient is φ = 492718464.

The previous prime is 1218015061. The next prime is 1218015089. The reversal of 1218015064 is 4605108121.

It is a super-2 number, since 2×1218015064² = 2967121392261848192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218015061) 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, 309799 + ... + 313705.

It is an arithmetic number, because the mean of its divisors is an integer number (43085700).

Almost surely, 2^1218015064 is an apocalyptic number.

1218015064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218015064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1378742400).

1218015064 is an abundant number, since it is smaller than the sum of its proper divisors (1539469736).

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

1218015064 is a wasteful number, since it uses less digits than its factorization.

1218015064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4232 (or 4228 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 1218015064 is about 34900.0725500679. The cubic root of 1218015064 is about 1067.9499174615.

The spelling of 1218015064 in words is "one billion, two hundred eighteen million, fifteen thousand, sixty-four".