135673520448 has 112 divisors (see below), whose sum is σ = 373723123520. Its totient is φ = 43399286784.

The previous prime is 135673520447. The next prime is 135673520449. The reversal of 135673520448 is 844025376531.

It is an interprime number because it is at equal distance from previous prime (135673520447) and next prime (135673520449).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 135673520397 and 135673520406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135673520447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387783 + ... + 649401.

Almost surely, 2^135673520448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135673520448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186861561760).

135673520448 is an abundant number, since it is smaller than the sum of its proper divisors (238049603072).

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

135673520448 is a wasteful number, since it uses less digits than its factorization.

135673520448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261744 (or 261734 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

Adding to 135673520448 its reverse (844025376531), we get a palindrome (979698896979).

The spelling of 135673520448 in words is "one hundred thirty-five billion, six hundred seventy-three million, five hundred twenty thousand, four hundred forty-eight".