2191261920832 has 56 divisors (see below), whose sum is σ = 4447568896056. Its totient is φ = 1070775533568.

The previous prime is 2191261920829. The next prime is 2191261920847. The reversal of 2191261920832 is 2380291621912.

It can be written as a sum of positive squares in 4 ways, for example, as 948161797696 + 1243100123136 = 973736^2 + 1114944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385083 + ... + 2128570.

Almost surely, 2^{2191261920832} is an apocalyptic number.

It is an amenable number.

2191261920832 is an abundant number, since it is smaller than the sum of its proper divisors (2256306975224).

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

2191261920832 is a wasteful number, since it uses less digits than its factorization.

2191261920832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513975 (or 2513965 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 2191261920832 in words is "two trillion, one hundred ninety-one billion, two hundred sixty-one million, nine hundred twenty thousand, eight hundred thirty-two".