11220025544 has 32 divisors (see below), whose sum is σ = 25892368320. Its totient is φ = 4438691136.

The previous prime is 11220025541. The next prime is 11220025549. The reversal of 11220025544 is 44552002211.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (11220025541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7705334 + ... + 7706789.

It is an arithmetic number, because the mean of its divisors is an integer number (809136510).

Almost surely, 2^11220025544 is an apocalyptic number.

11220025544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11220025544 is an abundant number, since it is smaller than the sum of its proper divisors (14672342776).

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

11220025544 is a wasteful number, since it uses less digits than its factorization.

11220025544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15412149 (or 15412145 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 11220025544 its reverse (44552002211), we get a palindrome (55772027755).

The spelling of 11220025544 in words is "eleven billion, two hundred twenty million, twenty-five thousand, five hundred forty-four".