8171376645 has 128 divisors (see below), whose sum is σ = 14736015360. Its totient is φ = 3849431040.

The previous prime is 8171376637. The next prime is 8171376649. The reversal of 8171376645 is 5466731718.

It is not a de Polignac number, because 8171376645 - 2³ = 8171376637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8171376594 and 8171376603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8171376649) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 52046907 + ... + 52047063.

It is an arithmetic number, because the mean of its divisors is an integer number (115125120).

Almost surely, 2^8171376645 is an apocalyptic number.

It is an amenable number.

8171376645 is a deficient number, since it is larger than the sum of its proper divisors (6564638715).

8171376645 is a wasteful number, since it uses less digits than its factorization.

8171376645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its digits is 846720, while the sum is 48.

The square root of 8171376645 is about 90395.6671804573. The cubic root of 8171376645 is about 2014.1806046779.

The spelling of 8171376645 in words is "eight billion, one hundred seventy-one million, three hundred seventy-six thousand, six hundred forty-five".