1968022089391 has 8 divisors (see below), whose sum is σ = 1971239600000. Its totient is φ = 1964804892120.

The previous prime is 1968022089353. The next prime is 1968022089419. The reversal of 1968022089391 is 1939802208691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968022089391 is a prime.

It is a super-2 number, since 2×1968022089391² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968022089191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14786860 + ... + 14919358.

It is an arithmetic number, because the mean of its divisors is an integer number (246404950000).

Almost surely, 2^{1968022089391} is an apocalyptic number.

1968022089391 is a deficient number, since it is larger than the sum of its proper divisors (3217510609).

1968022089391 is a wasteful number, since it uses less digits than its factorization.

1968022089391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156669.

The product of its (nonzero) digits is 3359232, while the sum is 58.

The spelling of 1968022089391 in words is "one trillion, nine hundred sixty-eight billion, twenty-two million, eighty-nine thousand, three hundred ninety-one".