6561196164 has 36 divisors (see below), whose sum is σ = 16795192960. Its totient is φ = 2159380080.

The previous prime is 6561196163. The next prime is 6561196171. The reversal of 6561196164 is 4616911656.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (6561196163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1150672 + ... + 1156359.

Almost surely, 2^6561196164 is an apocalyptic number.

It is an amenable number.

6561196164 is an abundant number, since it is smaller than the sum of its proper divisors (10233996796).

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

6561196164 is a wasteful number, since it uses less digits than its factorization.

6561196164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307120 (or 2307115 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 6561196164 is about 81001.2108798381. The cubic root of 6561196164 is about 1872.0940979711.

The spelling of 6561196164 in words is "six billion, five hundred sixty-one million, one hundred ninety-six thousand, one hundred sixty-four".