13061887521 has 8 divisors (see below), whose sum is σ = 17419431840. Its totient is φ = 8706134112.

The previous prime is 13061887507. The next prime is 13061887589. The reversal of 13061887521 is 12578816031.

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

It is not a de Polignac number, because 13061887521 - 2⁹ = 13061887009 is a prime.

It is a super-2 number, since 2×13061887521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13061887021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430615 + ... + 459948.

It is an arithmetic number, because the mean of its divisors is an integer number (2177428980).

Almost surely, 2^13061887521 is an apocalyptic number.

It is an amenable number.

13061887521 is a deficient number, since it is larger than the sum of its proper divisors (4357544319).

13061887521 is an equidigital number, since it uses as much as digits as its factorization.

13061887521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895455.

The product of its (nonzero) digits is 80640, while the sum is 42.

The spelling of 13061887521 in words is "thirteen billion, sixty-one million, eight hundred eighty-seven thousand, five hundred twenty-one".