1535541421013 has 4 divisors (see below), whose sum is σ = 1616359390560. Its totient is φ = 1454723451468.

The previous prime is 1535541421009. The next prime is 1535541421027. The reversal of 1535541421013 is 3101241455351.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1535541421013 - 2² = 1535541421009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1535541421213) 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, 40408984745 + ... + 40408984782.

It is an arithmetic number, because the mean of its divisors is an integer number (404089847640).

Almost surely, 2^{1535541421013} is an apocalyptic number.

It is an amenable number.

1535541421013 is a deficient number, since it is larger than the sum of its proper divisors (80817969547).

1535541421013 is an equidigital number, since it uses as much as digits as its factorization.

1535541421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80817969546.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 1535541421013 its reverse (3101241455351), we get a palindrome (4636782876364).

The spelling of 1535541421013 in words is "one trillion, five hundred thirty-five billion, five hundred forty-one million, four hundred twenty-one thousand, thirteen".