11989543358464 has 351 divisors, whose sum is σ = 28589598071031. Its totient is φ = 5012725186560.

The previous prime is 11989543358459. The next prime is 11989543358473. The reversal of 11989543358464 is 46485334598911.

The square root of 11989543358464 is 3462592.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11989543358393 and 11989543358402.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 91523231679 + ... + 91523231809.

Almost surely, 2^{11989543358464} is an apocalyptic number.

11989543358464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11989543358464 is the 3462592-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11989543358464

11989543358464 is an abundant number, since it is smaller than the sum of its proper divisors (16600054712567).

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

11989543358464 is an frugal number, since it uses more digits than its factorization.

11989543358464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 199 counting only the distinct ones).

The product of its digits is 447897600, while the sum is 70.

The spelling of 11989543358464 in words is "eleven trillion, nine hundred eighty-nine billion, five hundred forty-three million, three hundred fifty-eight thousand, four hundred sixty-four".