8537574521 has 4 divisors (see below), whose sum is σ = 9757228032. Its totient is φ = 7317921012.

The previous prime is 8537574431. The next prime is 8537574533. The reversal of 8537574521 is 1254757358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8537574521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8537574421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609826745 + ... + 609826758.

It is an arithmetic number, because the mean of its divisors is an integer number (2439307008).

Almost surely, 2^8537574521 is an apocalyptic number.

It is an amenable number.

8537574521 is a deficient number, since it is larger than the sum of its proper divisors (1219653511).

8537574521 is a wasteful number, since it uses less digits than its factorization.

8537574521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219653510.

The product of its digits is 1176000, while the sum is 47.

The square root of 8537574521 is about 92398.9963203064. The cubic root of 8537574521 is about 2043.8303117807.

The spelling of 8537574521 in words is "eight billion, five hundred thirty-seven million, five hundred seventy-four thousand, five hundred twenty-one".