12635437471 has 4 divisors (see below), whose sum is σ = 12640142592. Its totient is φ = 12630732352.

The previous prime is 12635437447. The next prime is 12635437501. The reversal of 12635437471 is 17473453621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12635437471 - 2⁵ = 12635437439 is a prime.

It is a super-3 number, since 3×12635437471³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12635437271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2348530 + ... + 2353903.

It is an arithmetic number, because the mean of its divisors is an integer number (3160035648).

Almost surely, 2^12635437471 is an apocalyptic number.

12635437471 is a deficient number, since it is larger than the sum of its proper divisors (4705121).

12635437471 is an equidigital number, since it uses as much as digits as its factorization.

12635437471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705120.

The product of its digits is 423360, while the sum is 43.

The spelling of 12635437471 in words is "twelve billion, six hundred thirty-five million, four hundred thirty-seven thousand, four hundred seventy-one".