12471521642 has 8 divisors (see below), whose sum is σ = 18707811300. Its totient is φ = 6235584544.

The previous prime is 12471521627. The next prime is 12471521653. The reversal of 12471521642 is 24612517421.

It can be written as a sum of positive squares in 2 ways, for example, as 8466024121 + 4005497521 = 92011^2 + 63289^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34334 + ... + 161622.

Almost surely, 2^12471521642 is an apocalyptic number.

12471521642 is a deficient number, since it is larger than the sum of its proper divisors (6236289658).

12471521642 is a wasteful number, since it uses less digits than its factorization.

12471521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176280.

The product of its digits is 26880, while the sum is 35.

The spelling of 12471521642 in words is "twelve billion, four hundred seventy-one million, five hundred twenty-one thousand, six hundred forty-two".