2196166458591 has 24 divisors (see below), whose sum is σ = 3630323565440. Its totient is φ = 1253254059216.

The previous prime is 2196166458443. The next prime is 2196166458601. The reversal of 2196166458591 is 1958546616912.

2196166458591 is a `hidden beast` number, since 2 + 1 + 9 + 616 + 6 + 4 + 5 + 8 + 5 + 9 + 1 = 666.

It is not a de Polignac number, because 2196166458591 - 2¹⁴ = 2196166442207 is a prime.

It is a super-2 number, since 2×2196166458591² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196166458391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23539225 + ... + 23632338.

Almost surely, 2^{2196166458591} is an apocalyptic number.

2196166458591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2196166458591 is a deficient number, since it is larger than the sum of its proper divisors (1434157106849).

2196166458591 is a wasteful number, since it uses less digits than its factorization.

2196166458591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47172315 (or 47172312 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 63.

The spelling of 2196166458591 in words is "two trillion, one hundred ninety-six billion, one hundred sixty-six million, four hundred fifty-eight thousand, five hundred ninety-one".