9564644401 has 9 divisors (see below), whose sum is σ = 10358358699. Its totient is φ = 8827728936.

The previous prime is 9564644393. The next prime is 9564644407. The reversal of 9564644401 is 1044464659.

The square root of 9564644401 is 97799.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1414888225 + 8149756176 = 37615^2 + 90276^2 .

It is not a de Polignac number, because 9564644401 - 2³ = 9564644393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9564644407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1267626 + ... + 1275148.

Almost surely, 2^9564644401 is an apocalyptic number.

9564644401 is the 97799-th square number.

9564644401 is the 48900-th centered octagonal number.

It is an amenable number.

9564644401 is a deficient number, since it is larger than the sum of its proper divisors (793714298).

9564644401 is an frugal number, since it uses more digits than its factorization.

9564644401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15072 (or 7536 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The cubic root of 9564644401 is about 2122.7048364305.

The spelling of 9564644401 in words is "nine billion, five hundred sixty-four million, six hundred forty-four thousand, four hundred one".