9640558872 has 64 divisors (see below), whose sum is σ = 30604953600. Its totient is φ = 2754444960.

The previous prime is 9640558871. The next prime is 9640558897. The reversal of 9640558872 is 2788550469.

9640558872 is a `hidden beast` number, since 9 + 6 + 4 + 0 + 558 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640558871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3186504 + ... + 3189527.

It is an arithmetic number, because the mean of its divisors is an integer number (478202400).

Almost surely, 2^9640558872 is an apocalyptic number.

It is an amenable number.

9640558872 is an abundant number, since it is smaller than the sum of its proper divisors (20964394728).

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

9640558872 is a wasteful number, since it uses less digits than its factorization.

9640558872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6376053 (or 6376043 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 54.

The square root of 9640558872 is about 98186.3476864274. The cubic root of 9640558872 is about 2128.3060048338.

The spelling of 9640558872 in words is "nine billion, six hundred forty million, five hundred fifty-eight thousand, eight hundred seventy-two".