11387123355 has 32 divisors (see below), whose sum is σ = 18557132544. Its totient is φ = 5961200256.

The previous prime is 11387123351. The next prime is 11387123357. The reversal of 11387123355 is 55332178311.

It is not a de Polignac number, because 11387123355 - 2² = 11387123351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11387123351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264397 + ... + 304433.

It is an arithmetic number, because the mean of its divisors is an integer number (579910392).

Almost surely, 2^11387123355 is an apocalyptic number.

11387123355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11387123355 is a deficient number, since it is larger than the sum of its proper divisors (7170009189).

11387123355 is a wasteful number, since it uses less digits than its factorization.

11387123355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40395.

The product of its digits is 75600, while the sum is 39.

The spelling of 11387123355 in words is "eleven billion, three hundred eighty-seven million, one hundred twenty-three thousand, three hundred fifty-five".