12549275639 has 4 divisors (see below), whose sum is σ = 12549536256. Its totient is φ = 12549015024.

The previous prime is 12549275597. The next prime is 12549275659. The reversal of 12549275639 is 93657294521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12549275639 is a prime.

It is a super-3 number, since 3×12549275639³ (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 (12549275659) 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, 34694 + ... + 162179.

It is an arithmetic number, because the mean of its divisors is an integer number (3137384064).

Almost surely, 2^12549275639 is an apocalyptic number.

12549275639 is a deficient number, since it is larger than the sum of its proper divisors (260617).

12549275639 is an equidigital number, since it uses as much as digits as its factorization.

12549275639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260616.

The product of its digits is 4082400, while the sum is 53.

The spelling of 12549275639 in words is "twelve billion, five hundred forty-nine million, two hundred seventy-five thousand, six hundred thirty-nine".