11551545320 has 128 divisors (see below), whose sum is σ = 30618086400. Its totient is φ = 3840224256.

The previous prime is 11551545293. The next prime is 11551545329. The reversal of 11551545320 is 2354515511.

It is not an unprimeable number, because it can be changed into a prime (11551545329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1430414 + ... + 1438466.

It is an arithmetic number, because the mean of its divisors is an integer number (239203800).

Almost surely, 2^11551545320 is an apocalyptic number.

11551545320 is a gapful number since it is divisible by the number (10) 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 11551545320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15309043200).

11551545320 is an abundant number, since it is smaller than the sum of its proper divisors (19066541080).

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

11551545320 is a wasteful number, since it uses less digits than its factorization.

11551545320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8227 (or 8223 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 11551545320 in words is "eleven billion, five hundred fifty-one million, five hundred forty-five thousand, three hundred twenty".