1211615810832 has 160 divisors (see below), whose sum is σ = 3604601290752. Its totient is φ = 343526487552.

The previous prime is 1211615810807. The next prime is 1211615810833. The reversal of 1211615810832 is 2380185161121.

It is not an unprimeable number, because it can be changed into a prime (1211615810833) 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 31 ways as a sum of consecutive naturals, for example, 34042198 + ... + 34077770.

Almost surely, 2^{1211615810832} is an apocalyptic number.

1211615810832 is a gapful number since it is divisible by the number (12) 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 1211615810832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1802300645376).

1211615810832 is an abundant number, since it is smaller than the sum of its proper divisors (2392985479920).

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

1211615810832 is a wasteful number, since it uses less digits than its factorization.

1211615810832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36365 (or 36359 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 1211615810832 in words is "one trillion, two hundred eleven billion, six hundred fifteen million, eight hundred ten thousand, eight hundred thirty-two".