11170897920 has 1120 divisors, whose sum is σ = 50621110848. Its totient is φ = 2293235712.

The previous prime is 11170897891. The next prime is 11170897921. The reversal of 11170897920 is 2979807111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1120).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11170897921) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 301916142 + ... + 301916178.

Almost surely, 2^11170897920 is an apocalyptic number.

11170897920 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 11170897920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25310555424).

11170897920 is an abundant number, since it is smaller than the sum of its proper divisors (39450212928).

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

11170897920 is an equidigital number, since it uses as much as digits as its factorization.

11170897920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 45.

It can be divided in two parts, 111708 and 97920, that added together give a triangular number (209628 = T₆₄₇).

The spelling of 11170897920 in words is "eleven billion, one hundred seventy million, eight hundred ninety-seven thousand, nine hundred twenty".