135442643646 has 16 divisors (see below), whose sum is σ = 277184945664. Its totient is φ = 44097604824.

The previous prime is 135442643621. The next prime is 135442643701. The reversal of 135442643646 is 646346244531.

It is a junction number, because it is equal to n+sod(n) for n = 135442643595 and 135442643604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262485486 + ... + 262486001.

It is an arithmetic number, because the mean of its divisors is an integer number (17324059104).

Almost surely, 2^135442643646 is an apocalyptic number.

135442643646 is an abundant number, since it is smaller than the sum of its proper divisors (141742302018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135442643646 is a wasteful number, since it uses less digits than its factorization.

135442643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524971535.

The product of its digits is 4976640, while the sum is 48.

The spelling of 135442643646 in words is "one hundred thirty-five billion, four hundred forty-two million, six hundred forty-three thousand, six hundred forty-six".