12536261534 has 4 divisors (see below), whose sum is σ = 18804392304. Its totient is φ = 6268130766.

The previous prime is 12536261513. The next prime is 12536261537. The reversal of 12536261534 is 43516263521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12536261537) 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 as a sum of consecutive naturals, namely, 3134065382 + ... + 3134065385.

It is an arithmetic number, because the mean of its divisors is an integer number (4701098076).

Almost surely, 2^12536261534 is an apocalyptic number.

12536261534 is a deficient number, since it is larger than the sum of its proper divisors (6268130770).

12536261534 is an equidigital number, since it uses as much as digits as its factorization.

12536261534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6268130769.

The product of its digits is 129600, while the sum is 38.

The spelling of 12536261534 in words is "twelve billion, five hundred thirty-six million, two hundred sixty-one thousand, five hundred thirty-four".