13571573157 has 6 divisors (see below), whose sum is σ = 19603383462. Its totient is φ = 9047715432.

The previous prime is 13571573129. The next prime is 13571573179. The reversal of 13571573157 is 75137517531.

13571573157 is a `hidden beast` number, since 1 + 3 + 5 + 71 + 573 + 1 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8464184001 + 5107389156 = 92001^2 + 71466^2 .

It is not a de Polignac number, because 13571573157 - 2¹² = 13571569061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13571573857) 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, 753976278 + ... + 753976295.

It is an arithmetic number, because the mean of its divisors is an integer number (3267230577).

Almost surely, 2^13571573157 is an apocalyptic number.

It is an amenable number.

13571573157 is a deficient number, since it is larger than the sum of its proper divisors (6031810305).

13571573157 is a wasteful number, since it uses less digits than its factorization.

13571573157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507952579 (or 1507952576 counting only the distinct ones).

The product of its digits is 385875, while the sum is 45.

The spelling of 13571573157 in words is "thirteen billion, five hundred seventy-one million, five hundred seventy-three thousand, one hundred fifty-seven".