2171189156448 has 48 divisors (see below), whose sum is σ = 6137784734256. Its totient is φ = 668058201600.

The previous prime is 2171189156447. The next prime is 2171189156459. The reversal of 2171189156448 is 8446519811712.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-4 number, since 4×2171189156448⁴ (a number of 50 digits) contains 4444 as substring.

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 7 ways as a sum of consecutive naturals, for example, 869866203 + ... + 869868698.

It is an arithmetic number, because the mean of its divisors is an integer number (127870515297).

Almost surely, 2^{2171189156448} is an apocalyptic number.

It is an amenable number.

2171189156448 is an abundant number, since it is smaller than the sum of its proper divisors (3966595577808).

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

2171189156448 is a wasteful number, since it uses less digits than its factorization.

2171189156448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739734927 (or 1739734919 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 57.

The spelling of 2171189156448 in words is "two trillion, one hundred seventy-one billion, one hundred eighty-nine million, one hundred fifty-six thousand, four hundred forty-eight".