1156221368500 has 288 divisors, whose sum is σ = 2872633300992. Its totient is φ = 405820800000.

The previous prime is 1156221368447. The next prime is 1156221368539. The reversal of 1156221368500 is 58631226511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1183440012 + ... + 1183440988.

It is an arithmetic number, because the mean of its divisors is an integer number (9974421184).

Almost surely, 2^{1156221368500} is an apocalyptic number.

1156221368500 is a gapful number since it is divisible by the number (10) 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 1156221368500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436316650496).

1156221368500 is an abundant number, since it is smaller than the sum of its proper divisors (1716411932492).

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

1156221368500 is a wasteful number, since it uses less digits than its factorization.

1156221368500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680 (or 1657 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 1156221368500 in words is "one trillion, one hundred fifty-six billion, two hundred twenty-one million, three hundred sixty-eight thousand, five hundred".