135446644531 has 4 divisors (see below), whose sum is σ = 147759975864. Its totient is φ = 123133313200.

The previous prime is 135446644523. The next prime is 135446644561.

135446644531 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 135446644531 - 2³ = 135446644523 is a prime.

It is a super-2 number, since 2×135446644531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135446644511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6156665650 + ... + 6156665671.

It is an arithmetic number, because the mean of its divisors is an integer number (36939993966).

Almost surely, 2^135446644531 is an apocalyptic number.

135446644531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

135446644531 is a deficient number, since it is larger than the sum of its proper divisors (12313331333).

135446644531 is a wasteful number, since it uses less digits than its factorization.

135446644531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12313331332.

The product of its digits is 2073600, while the sum is 46.

It can be divided in two parts, 135446 and 644531, that added together give a palindrome (779977).

The spelling of 135446644531 in words is "one hundred thirty-five billion, four hundred forty-six million, six hundred forty-four thousand, five hundred thirty-one".