1236660020016 has 80 divisors (see below), whose sum is σ = 3235682664960. Its totient is φ = 406934311680.

The previous prime is 1236660019999. The next prime is 1236660020027. The reversal of 1236660020016 is 6100200666321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26076646 + ... + 26124026.

It is an arithmetic number, because the mean of its divisors is an integer number (40446033312).

Almost surely, 2^{1236660020016} is an apocalyptic number.

1236660020016 is a gapful number since it is divisible by the number (16) 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 1236660020016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1617841332480).

1236660020016 is an abundant number, since it is smaller than the sum of its proper divisors (1999022644944).

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

1236660020016 is a wasteful number, since it uses less digits than its factorization.

1236660020016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54354 (or 54348 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 1236660020016 its reverse (6100200666321), we get a palindrome (7336860686337).

The spelling of 1236660020016 in words is "one trillion, two hundred thirty-six billion, six hundred sixty million, twenty thousand, sixteen".