13143527661 has 16 divisors (see below), whose sum is σ = 19134240768. Its totient is φ = 7958948400.

The previous prime is 13143527659. The next prime is 13143527693. The reversal of 13143527661 is 16672534131.

It is not a de Polignac number, because 13143527661 - 2¹ = 13143527659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143527641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131421 + ... + 208706.

It is an arithmetic number, because the mean of its divisors is an integer number (1195890048).

Almost surely, 2^13143527661 is an apocalyptic number.

13143527661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13143527661 is a deficient number, since it is larger than the sum of its proper divisors (5990713107).

13143527661 is a wasteful number, since it uses less digits than its factorization.

13143527661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341312.

The product of its digits is 90720, while the sum is 39.

The spelling of 13143527661 in words is "thirteen billion, one hundred forty-three million, five hundred twenty-seven thousand, six hundred sixty-one".