249549971427 has 12 divisors (see below), whose sum is σ = 362880273600. Its totient is φ = 165250092048.

The previous prime is 249549971417. The next prime is 249549971453. The reversal of 249549971427 is 724179945942.

249549971427 is a `hidden beast` number, since 2 + 4 + 9 + 54 + 99 + 71 + 427 = 666.

It is not a de Polignac number, because 249549971427 - 2¹⁰ = 249549970403 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249549971417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93044883 + ... + 93047564.

It is an arithmetic number, because the mean of its divisors is an integer number (30240022800).

Almost surely, 2^249549971427 is an apocalyptic number.

249549971427 is a deficient number, since it is larger than the sum of its proper divisors (113330302173).

249549971427 is a wasteful number, since it uses less digits than its factorization.

249549971427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186092602 (or 186092599 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 249549971427 in words is "two hundred forty-nine billion, five hundred forty-nine million, nine hundred seventy-one thousand, four hundred twenty-seven".