1366131081432 has 128 divisors (see below), whose sum is σ = 3694999714560. Its totient is φ = 418414118400.

The previous prime is 1366131081349. The next prime is 1366131081479. The reversal of 1366131081432 is 2341801316631.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74031807 + ... + 74050257.

It is an arithmetic number, because the mean of its divisors is an integer number (28867185270).

Almost surely, 2^{1366131081432} is an apocalyptic number.

1366131081432 is a gapful number since it is divisible by the number (12) 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 1366131081432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1847499857280).

1366131081432 is an abundant number, since it is smaller than the sum of its proper divisors (2328868633128).

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

1366131081432 is a wasteful number, since it uses less digits than its factorization.

1366131081432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19553 (or 19549 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 1366131081432 in words is "one trillion, three hundred sixty-six billion, one hundred thirty-one million, eighty-one thousand, four hundred thirty-two".