13551210443550 has 96 divisors (see below), whose sum is σ = 36193039747200. Its totient is φ = 3335601110400.

The previous prime is 13551210443501. The next prime is 13551210443623. The reversal of 13551210443550 is 5534401215531.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 13551210443499 and 13551210443508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134521101 + ... + 134621799.

It is an arithmetic number, because the mean of its divisors is an integer number (377010830700).

Almost surely, 2^{13551210443550} is an apocalyptic number.

13551210443550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13551210443550 is an abundant number, since it is smaller than the sum of its proper divisors (22641829303650).

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

13551210443550 is a wasteful number, since it uses less digits than its factorization.

13551210443550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169738 (or 169733 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 13551210443550 in words is "thirteen trillion, five hundred fifty-one billion, two hundred ten million, four hundred forty-three thousand, five hundred fifty".