11551722270 has 128 divisors (see below), whose sum is σ = 31239516672. Its totient is φ = 2709158400.

The previous prime is 11551722257. The next prime is 11551722271. The reversal of 11551722270 is 7222715511.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551722271) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2207397 + ... + 2212623.

It is an arithmetic number, because the mean of its divisors is an integer number (244058724).

Almost surely, 2^11551722270 is an apocalyptic number.

11551722270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11551722270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15619758336).

11551722270 is an abundant number, since it is smaller than the sum of its proper divisors (19687794402).

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

11551722270 is a wasteful number, since it uses less digits than its factorization.

11551722270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5466.

The product of its (nonzero) digits is 9800, while the sum is 33.

The spelling of 11551722270 in words is "eleven billion, five hundred fifty-one million, seven hundred twenty-two thousand, two hundred seventy".