1212556774336 has 112 divisors (see below), whose sum is σ = 2556796999680. Its totient is φ = 569638056960.

The previous prime is 1212556774333. The next prime is 1212556774361. The reversal of 1212556774336 is 6334776552121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212556774333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14204550 + ... + 14289658.

It is an arithmetic number, because the mean of its divisors is an integer number (22828544640).

Almost surely, 2^{1212556774336} is an apocalyptic number.

1212556774336 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 1212556774336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278398499840).

1212556774336 is an abundant number, since it is smaller than the sum of its proper divisors (1344240225344).

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

1212556774336 is a wasteful number, since it uses less digits than its factorization.

1212556774336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85362 (or 85352 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 52.

The spelling of 1212556774336 in words is "one trillion, two hundred twelve billion, five hundred fifty-six million, seven hundred seventy-four thousand, three hundred thirty-six".