2191326739772 has 12 divisors (see below), whose sum is σ = 3839458827960. Its totient is φ = 1094338503216.

The previous prime is 2191326739727. The next prime is 2191326739787. The reversal of 2191326739772 is 2779376231912.

It is a super-2 number, since 2×2191326739772² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331212947 + ... + 331219562.

It is an arithmetic number, because the mean of its divisors is an integer number (319954902330).

Almost surely, 2^{2191326739772} is an apocalyptic number.

It is an amenable number.

2191326739772 is a deficient number, since it is larger than the sum of its proper divisors (1648132088188).

2191326739772 is a wasteful number, since it uses less digits than its factorization.

2191326739772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662433340 (or 662433338 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 59.

The spelling of 2191326739772 in words is "two trillion, one hundred ninety-one billion, three hundred twenty-six million, seven hundred thirty-nine thousand, seven hundred seventy-two".