11973564485550 has 72 divisors (see below), whose sum is σ = 32184975524520. Its totient is φ = 3191362545600.

The previous prime is 11973564485537. The next prime is 11973564485581. The reversal of 11973564485550 is 5558446537911.

11973564485550 is a `hidden beast` number, since 1 + 1 + 9 + 7 + 35 + 6 + 4 + 48 + 5 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5710645 + ... + 7520544.

Almost surely, 2^{11973564485550} is an apocalyptic number.

11973564485550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11973564485550 is an abundant number, since it is smaller than the sum of its proper divisors (20211411038970).

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

11973564485550 is a wasteful number, since it uses less digits than its factorization.

11973564485550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13233218 (or 13233210 counting only the distinct ones).

The product of its (nonzero) digits is 90720000, while the sum is 63.

The spelling of 11973564485550 in words is "eleven trillion, nine hundred seventy-three billion, five hundred sixty-four million, four hundred eighty-five thousand, five hundred fifty".