2171189156446 has 8 divisors (see below), whose sum is σ = 3256800416424. Its totient is φ = 1085589017640.

The previous prime is 2171189156363. The next prime is 2171189156447. The reversal of 2171189156446 is 6446519811712.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171189156447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2273760 + ... + 3084211.

It is an arithmetic number, because the mean of its divisors is an integer number (407100052053).

Almost surely, 2^{2171189156446} is an apocalyptic number.

2171189156446 is a deficient number, since it is larger than the sum of its proper divisors (1085611259978).

2171189156446 is a wasteful number, since it uses less digits than its factorization.

2171189156446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560586.

The product of its digits is 2903040, while the sum is 55.

The spelling of 2171189156446 in words is "two trillion, one hundred seventy-one billion, one hundred eighty-nine million, one hundred fifty-six thousand, four hundred forty-six".