2171031605445 has 32 divisors (see below), whose sum is σ = 3646478499840. Its totient is φ = 1101540352320.

The previous prime is 2171031605423. The next prime is 2171031605489. The reversal of 2171031605445 is 5445061301712.

It is not a de Polignac number, because 2171031605445 - 2⁸ = 2171031605189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39539389 + ... + 39594258.

It is an arithmetic number, because the mean of its divisors is an integer number (113952453120).

Almost surely, 2^{2171031605445} is an apocalyptic number.

It is an amenable number.

2171031605445 is a deficient number, since it is larger than the sum of its proper divisors (1475446894395).

2171031605445 is a wasteful number, since it uses less digits than its factorization.

2171031605445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79133745.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 2171031605445 in words is "two trillion, one hundred seventy-one billion, thirty-one million, six hundred five thousand, four hundred forty-five".