13451534561220 has 192 divisors, whose sum is σ = 43772574375936. Its totient is φ = 3022711211520.

The previous prime is 13451534561203. The next prime is 13451534561233. The reversal of 13451534561220 is 2216543515431.

It is a super-2 number, since 2×13451534561220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51185797 + ... + 51447923.

It is an arithmetic number, because the mean of its divisors is an integer number (227982158208).

Almost surely, 2^{13451534561220} is an apocalyptic number.

13451534561220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13451534561220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21886287187968).

13451534561220 is an abundant number, since it is smaller than the sum of its proper divisors (30321039814716).

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

13451534561220 is a wasteful number, since it uses less digits than its factorization.

13451534561220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264210 (or 264208 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 13451534561220 in words is "thirteen trillion, four hundred fifty-one billion, five hundred thirty-four million, five hundred sixty-one thousand, two hundred twenty".