2191974580456 has 32 divisors (see below), whose sum is σ = 4204182074400. Its totient is φ = 1071024136000.

The previous prime is 2191974580429. The next prime is 2191974580459. The reversal of 2191974580456 is 6540854791912.

It is a super-2 number, since 2×2191974580456² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2191974580394 and 2191974580403.

It is not an unprimeable number, because it can be changed into a prime (2191974580459) 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, 10191886 + ... + 10404733.

It is an arithmetic number, because the mean of its divisors is an integer number (131380689825).

Almost surely, 2^{2191974580456} is an apocalyptic number.

It is an amenable number.

2191974580456 is a deficient number, since it is larger than the sum of its proper divisors (2012207493944).

2191974580456 is a wasteful number, since it uses less digits than its factorization.

2191974580456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20596929 (or 20596925 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 61.

The spelling of 2191974580456 in words is "two trillion, one hundred ninety-one billion, nine hundred seventy-four million, five hundred eighty thousand, four hundred fifty-six".