11147455557 has 18 divisors (see below), whose sum is σ = 18730759398. Its totient is φ = 6369974352.

The previous prime is 11147455531. The next prime is 11147455619. The reversal of 11147455557 is 75555474111.

11147455557 is a `hidden beast` number, since 1 + 1 + 1 + 47 + 4 + 55 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10627341921 + 520113636 = 103089^2 + 22806^2 .

It is not a de Polignac number, because 11147455557 - 2⁸ = 11147455301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11147453557) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12638398 + ... + 12639279.

Almost surely, 2^11147455557 is an apocalyptic number.

It is an amenable number.

11147455557 is a deficient number, since it is larger than the sum of its proper divisors (7583303841).

11147455557 is a wasteful number, since it uses less digits than its factorization.

11147455557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25277697 (or 25277687 counting only the distinct ones).

The product of its digits is 490000, while the sum is 45.

The spelling of 11147455557 in words is "eleven billion, one hundred forty-seven million, four hundred fifty-five thousand, five hundred fifty-seven".