1218415601 has 8 divisors (see below), whose sum is σ = 1312422720. Its totient is φ = 1124448912.

The previous prime is 1218415591. The next prime is 1218415633. The reversal of 1218415601 is 1065148121.

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 1218415601 - 2¹⁸ = 1218153457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218415651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87356 + ... + 100338.

It is an arithmetic number, because the mean of its divisors is an integer number (164052840).

Almost surely, 2^1218415601 is an apocalyptic number.

It is an amenable number.

1218415601 is a deficient number, since it is larger than the sum of its proper divisors (94007119).

1218415601 is a wasteful number, since it uses less digits than its factorization.

1218415601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20215.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1218415601 is about 34905.8104188973. The cubic root of 1218415601 is about 1068.0669676221.

The spelling of 1218415601 in words is "one billion, two hundred eighteen million, four hundred fifteen thousand, six hundred one".