12571271544 has 32 divisors (see below), whose sum is σ = 33845731920. Its totient is φ = 3868083456.

The previous prime is 12571271543. The next prime is 12571271599. The reversal of 12571271544 is 44517217521.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12571271543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20145957 + ... + 20146580.

Almost surely, 2^12571271544 is an apocalyptic number.

It is an amenable number.

12571271544 is an abundant number, since it is smaller than the sum of its proper divisors (21274460376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12571271544 is a wasteful number, since it uses less digits than its factorization.

12571271544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40292559 (or 40292555 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The spelling of 12571271544 in words is "twelve billion, five hundred seventy-one million, two hundred seventy-one thousand, five hundred forty-four".