1213404532736 has 104 divisors (see below), whose sum is σ = 2648130379488. Its totient is φ = 551333888000.

The previous prime is 1213404532733. The next prime is 1213404532799. The reversal of 1213404532736 is 6372354043121.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1213404532693 and 1213404532702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213404532733) 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 7 ways as a sum of consecutive naturals, for example, 211354826 + ... + 211360566.

Almost surely, 2^{1213404532736} is an apocalyptic number.

1213404532736 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 1213404532736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324065189744).

1213404532736 is an abundant number, since it is smaller than the sum of its proper divisors (1434725846752).

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

1213404532736 is an equidigital number, since it uses as much as digits as its factorization.

1213404532736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10467 (or 10445 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

Adding to 1213404532736 its reverse (6372354043121), we get a palindrome (7585758575857).

The spelling of 1213404532736 in words is "one trillion, two hundred thirteen billion, four hundred four million, five hundred thirty-two thousand, seven hundred thirty-six".