1671564320 has 24 divisors (see below), whose sum is σ = 3949071084. Its totient is φ = 668625664.

The previous prime is 1671564319. The next prime is 1671564331. The reversal of 1671564320 is 234651761.

It can be written as a sum of positive squares in 2 ways, for example, as 1487799184 + 183765136 = 38572^2 + 13556^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5223479 + ... + 5223798.

Almost surely, 2^1671564320 is an apocalyptic number.

1671564320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1671564320 is an abundant number, since it is smaller than the sum of its proper divisors (2277506764).

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

1671564320 is a wasteful number, since it uses less digits than its factorization.

1671564320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447292 (or 10447284 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1671564320 is about 40884.7688020857. The cubic root of 1671564320 is about 1186.7913277838.

The spelling of 1671564320 in words is "one billion, six hundred seventy-one million, five hundred sixty-four thousand, three hundred twenty".