11555601426 has 20 divisors (see below), whose sum is σ = 25893107262. Its totient is φ = 3851867088.

The previous prime is 11555601413. The next prime is 11555601427. The reversal of 11555601426 is 62410655511.

11555601426 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 5 + 601 + 42 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8887775625 + 2667825801 = 94275^2 + 51651^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11555601427) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 35665275 + ... + 35665598.

Almost surely, 2^11555601426 is an apocalyptic number.

11555601426 is an abundant number, since it is smaller than the sum of its proper divisors (14337505836).

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

11555601426 is an equidigital number, since it uses as much as digits as its factorization.

11555601426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71330887 (or 71330878 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 11555601426 in words is "eleven billion, five hundred fifty-five million, six hundred one thousand, four hundred twenty-six".