13661132213526 has 32 divisors (see below), whose sum is σ = 31225700163840. Its totient is φ = 3903148744416.

The previous prime is 13661132213489. The next prime is 13661132213549. The reversal of 13661132213526 is 62531223116631.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4138065 + ... + 6666771.

It is an arithmetic number, because the mean of its divisors is an integer number (975803130120).

Almost surely, 2^{13661132213526} is an apocalyptic number.

13661132213526 is an abundant number, since it is smaller than the sum of its proper divisors (17564567950314).

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

13661132213526 is a wasteful number, since it uses less digits than its factorization.

13661132213526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657348.

The product of its digits is 233280, while the sum is 42.

The spelling of 13661132213526 in words is "thirteen trillion, six hundred sixty-one billion, one hundred thirty-two million, two hundred thirteen thousand, five hundred twenty-six".