2170643672 has 8 divisors (see below), whose sum is σ = 4069956900. Its totient is φ = 1085321832.

The previous prime is 2170643663. The next prime is 2170643681. The reversal of 2170643672 is 2763460712.

It is an interprime number because it is at equal distance from previous prime (2170643663) and next prime (2170643681).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135665222 + ... + 135665237.

Almost surely, 2^2170643672 is an apocalyptic number.

It is an amenable number.

2170643672 is a deficient number, since it is larger than the sum of its proper divisors (1899313228).

2170643672 is a wasteful number, since it uses less digits than its factorization.

2170643672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271330465 (or 271330461 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 2170643672 is about 46590.1671171074. The cubic root of 2170643672 is about 1294.7805856554.

The spelling of 2170643672 in words is "two billion, one hundred seventy million, six hundred forty-three thousand, six hundred seventy-two".