11155555403320 has 16 divisors (see below), whose sum is σ = 25099999657560. Its totient is φ = 4462222161312.

The previous prime is 11155555403263. The next prime is 11155555403381. The reversal of 11155555403320 is 2330455555111.

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 278888885083 = 11155555403320 / (1 + 1 + 1 + 5 + 5 + 5 + 5 + 5 + 4 + 0 + 3 + 3 + 2 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139444442502 + ... + 139444442581.

Almost surely, 2^{11155555403320} is an apocalyptic number.

11155555403320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11155555403320 is an abundant number, since it is smaller than the sum of its proper divisors (13944444254240).

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

11155555403320 is a wasteful number, since it uses less digits than its factorization.

11155555403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278888885094 (or 278888885090 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 11155555403320 in words is "eleven trillion, one hundred fifty-five billion, five hundred fifty-five million, four hundred three thousand, three hundred twenty".