11420280155 has 4 divisors (see below), whose sum is σ = 13704336192. Its totient is φ = 9136224120.

The previous prime is 11420280149. The next prime is 11420280169. The reversal of 11420280155 is 55108202411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11420280155 - 2⁴ = 11420280139 is a prime.

It is a Duffinian 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, 1142028011 + ... + 1142028020.

It is an arithmetic number, because the mean of its divisors is an integer number (3426084048).

Almost surely, 2^11420280155 is an apocalyptic number.

11420280155 is a deficient number, since it is larger than the sum of its proper divisors (2284056037).

11420280155 is an equidigital number, since it uses as much as digits as its factorization.

11420280155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284056036.

The product of its (nonzero) digits is 3200, while the sum is 29.

Adding to 11420280155 its reverse (55108202411), we get a palindrome (66528482566).

The spelling of 11420280155 in words is "eleven billion, four hundred twenty million, two hundred eighty thousand, one hundred fifty-five".