13425354551521 has 6 divisors (see below), whose sum is σ = 14756794672466. Its totient is φ = 12204867774000.

The previous prime is 13425354551509. The next prime is 13425354551533. The reversal of 13425354551521 is 12515545352431.

It is an interprime number because it is at equal distance from previous prime (13425354551509) and next prime (13425354551533).

It can be written as a sum of positive squares in only one way, i.e., 10754300390625 + 2671054160896 = 3279375^2 + 1634336^2 .

It is not a de Polignac number, because 13425354551521 - 2¹⁷ = 13425354420449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13425354591521) 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 5 ways as a sum of consecutive naturals, for example, 55476671580 + ... + 55476671821.

Almost surely, 2^{13425354551521} is an apocalyptic number.

13425354551521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13425354551521 is a deficient number, since it is larger than the sum of its proper divisors (1331440120945).

13425354551521 is a wasteful number, since it uses less digits than its factorization.

13425354551521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110953343423 (or 110953343412 counting only the distinct ones).

The product of its digits is 1800000, while the sum is 46.

The spelling of 13425354551521 in words is "thirteen trillion, four hundred twenty-five billion, three hundred fifty-four million, five hundred fifty-one thousand, five hundred twenty-one".