11361405591 has 6 divisors (see below), whose sum is σ = 16410919200. Its totient is φ = 7574270388.

The previous prime is 11361405581. The next prime is 11361405607. The reversal of 11361405591 is 19550416311.

11361405591 is a `hidden beast` number, since 1 + 1 + 3 + 61 + 4 + 0 + 5 + 591 = 666.

It is not a de Polignac number, because 11361405591 - 2²² = 11357211287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11361405571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 631189191 + ... + 631189208.

It is an arithmetic number, because the mean of its divisors is an integer number (2735153200).

Almost surely, 2^11361405591 is an apocalyptic number.

11361405591 is a deficient number, since it is larger than the sum of its proper divisors (5049513609).

11361405591 is a wasteful number, since it uses less digits than its factorization.

11361405591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262378405 (or 1262378402 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The spelling of 11361405591 in words is "eleven billion, three hundred sixty-one million, four hundred five thousand, five hundred ninety-one".