11138855535 has 40 divisors (see below), whose sum is σ = 20022104256. Its totient is φ = 5924456640.

The previous prime is 11138855501. The next prime is 11138855561. The reversal of 11138855535 is 53555883111.

11138855535 is a `hidden beast` number, since 1 + 1 + 1 + 38 + 85 + 5 + 535 = 666.

It is not a de Polignac number, because 11138855535 - 2¹⁸ = 11138593391 is a prime.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 111165 + ... + 186105.

Almost surely, 2^11138855535 is an apocalyptic number.

11138855535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11138855535 is a deficient number, since it is larger than the sum of its proper divisors (8883248721).

11138855535 is an equidigital number, since it uses as much as digits as its factorization.

11138855535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75325 (or 75316 counting only the distinct ones).

The product of its digits is 360000, while the sum is 45.

The spelling of 11138855535 in words is "eleven billion, one hundred thirty-eight million, eight hundred fifty-five thousand, five hundred thirty-five".