12571787451 has 4 divisors (see below), whose sum is σ = 16762383272. Its totient is φ = 8381191632.

The previous prime is 12571787429. The next prime is 12571787489. The reversal of 12571787451 is 15478717521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15478717521 = 3 ⋅5159572507.

It is not a de Polignac number, because 12571787451 - 2⁹ = 12571786939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12571787451.

It is not an unprimeable number, because it can be changed into a prime (12571787251) 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, 2095297906 + ... + 2095297911.

It is an arithmetic number, because the mean of its divisors is an integer number (4190595818).

Almost surely, 2^12571787451 is an apocalyptic number.

12571787451 is a deficient number, since it is larger than the sum of its proper divisors (4190595821).

12571787451 is an equidigital number, since it uses as much as digits as its factorization.

12571787451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4190595820.

The product of its digits is 548800, while the sum is 48.

The spelling of 12571787451 in words is "twelve billion, five hundred seventy-one million, seven hundred eighty-seven thousand, four hundred fifty-one".