12535223421461 has 8 divisors (see below), whose sum is σ = 13828726776984. Its totient is φ = 11288756551680.

The previous prime is 12535223421449. The next prime is 12535223421463. The reversal of 12535223421461 is 16412432253521.

It can be written as a sum of positive squares in 4 ways, for example, as 358089740836 + 12177133680625 = 598406^2 + 3489575^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12535223421461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12535223421463) 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 7 ways as a sum of consecutive naturals, for example, 11759120876 + ... + 11759121941.

It is an arithmetic number, because the mean of its divisors is an integer number (1728590847123).

Almost surely, 2^{12535223421461} is an apocalyptic number.

It is an amenable number.

12535223421461 is a deficient number, since it is larger than the sum of its proper divisors (1293503355523).

12535223421461 is a wasteful number, since it uses less digits than its factorization.

12535223421461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23518242871.

The product of its digits is 345600, while the sum is 41.

Adding to 12535223421461 its reverse (16412432253521), we get a palindrome (28947655674982).

The spelling of 12535223421461 in words is "twelve trillion, five hundred thirty-five billion, two hundred twenty-three million, four hundred twenty-one thousand, four hundred sixty-one".