135261641421 has 16 divisors (see below), whose sum is σ = 210934334400. Its totient is φ = 85428404784.

The previous prime is 135261641407. The next prime is 135261641441. The reversal of 135261641421 is 124146162531.

135261641421 is a `hidden beast` number, since 1 + 3 + 5 + 2 + 6 + 1 + 641 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 135261641421 - 2⁷ = 135261641293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135261641401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131833446 + ... + 131834471.

It is an arithmetic number, because the mean of its divisors is an integer number (13183395900).

Almost surely, 2^135261641421 is an apocalyptic number.

It is an amenable number.

135261641421 is a deficient number, since it is larger than the sum of its proper divisors (75672692979).

135261641421 is a wasteful number, since it uses less digits than its factorization.

135261641421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263667945 (or 263667939 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The spelling of 135261641421 in words is "one hundred thirty-five billion, two hundred sixty-one million, six hundred forty-one thousand, four hundred twenty-one".