9609615540 has 144 divisors (see below), whose sum is σ = 33401991168. Its totient is φ = 2190638592.

The previous prime is 9609615539. The next prime is 9609615557. The reversal of 9609615540 is 455169069.

It is a happy number.

9609615540 is a `hidden beast` number, since 9 + 6 + 0 + 96 + 1 + 554 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 472624 + ... + 492536.

It is an arithmetic number, because the mean of its divisors is an integer number (231958272).

Almost surely, 2^9609615540 is an apocalyptic number.

9609615540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9609615540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16700995584).

9609615540 is an abundant number, since it is smaller than the sum of its proper divisors (23792375628).

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

9609615540 is a wasteful number, since it uses less digits than its factorization.

9609615540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318 (or 20313 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 9609615540 is about 98028.6465274309. The cubic root of 9609615540 is about 2126.0264874173.

The spelling of 9609615540 in words is "nine billion, six hundred nine million, six hundred fifteen thousand, five hundred forty".