16191961266384 has 60 divisors (see below), whose sum is σ = 45315400859872. Its totient is φ = 5397273000000.

The previous prime is 16191961266307. The next prime is 16191961266401. The reversal of 16191961266384 is 48366216919161.

16191961266384 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 1 + 9 + 612 + 6 + 6 + 3 + 8 + 4 = 666.

It is a super-3 number, since 3×16191961266384³ (a number of 41 digits) contains 333 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18471789 + ... + 19328499.

Almost surely, 2^{16191961266384} is an apocalyptic number.

It is an amenable number.

16191961266384 is an abundant number, since it is smaller than the sum of its proper divisors (29123439593488).

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

16191961266384 is a wasteful number, since it uses less digits than its factorization.

16191961266384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987976 (or 987967 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The spelling of 16191961266384 in words is "sixteen trillion, one hundred ninety-one billion, nine hundred sixty-one million, two hundred sixty-six thousand, three hundred eighty-four".