1191212023680 has 1280 divisors, whose sum is σ = 4993391525760. Its totient is φ = 264996126720.

The previous prime is 1191212023667. The next prime is 1191212023717. The reversal of 1191212023680 is 863202121911.

1191212023680 is a `hidden beast` number, since 1 + 1 + 91 + 2 + 1 + 202 + 368 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4635066112 + ... + 4635066368.

Almost surely, 2^{1191212023680} is an apocalyptic number.

1191212023680 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 1191212023680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2496695762880).

1191212023680 is an abundant number, since it is smaller than the sum of its proper divisors (3802179502080).

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

1191212023680 is a wasteful number, since it uses less digits than its factorization.

1191212023680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The spelling of 1191212023680 in words is "one trillion, one hundred ninety-one billion, two hundred twelve million, twenty-three thousand, six hundred eighty".