13505493551 has 8 divisors (see below), whose sum is σ = 14734395264. Its totient is φ = 12276780120.

The previous prime is 13505493541. The next prime is 13505493557. The reversal of 13505493551 is 15539450531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-13505493551 is a prime.

It is a super-2 number, since 2×13505493551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13505493499 and 13505493508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13505493557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132830 + ... + 211316.

It is an arithmetic number, because the mean of its divisors is an integer number (1841799408).

Almost surely, 2^13505493551 is an apocalyptic number.

13505493551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13505493551 is a deficient number, since it is larger than the sum of its proper divisors (1228901713).

13505493551 is a wasteful number, since it uses less digits than its factorization.

13505493551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94141.

The product of its (nonzero) digits is 202500, while the sum is 41.

The spelling of 13505493551 in words is "thirteen billion, five hundred five million, four hundred ninety-three thousand, five hundred fifty-one".