9561438380 has 48 divisors (see below), whose sum is σ = 21709858464. Its totient is φ = 3516288000.

The previous prime is 9561438331. The next prime is 9561438391. The reversal of 9561438380 is 838341659.

It is a super-2 number, since 2×9561438380² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7997 + ... + 138516.

It is an arithmetic number, because the mean of its divisors is an integer number (452288718).

Almost surely, 2^9561438380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9561438380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10854929232).

9561438380 is an abundant number, since it is smaller than the sum of its proper divisors (12148420084).

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

9561438380 is a wasteful number, since it uses less digits than its factorization.

9561438380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146786 (or 146784 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 9561438380 is about 97782.6077582307. The cubic root of 9561438380 is about 2122.4676365751.

The spelling of 9561438380 in words is "nine billion, five hundred sixty-one million, four hundred thirty-eight thousand, three hundred eighty".