1366155634560 has 128 divisors (see below), whose sum is σ = 4356530935200. Its totient is φ = 364148391936.

The previous prime is 1366155634523. The next prime is 1366155634577. The reversal of 1366155634560 is 654365516631.

It is a tau number, because it is divible by the number of its divisors (128).

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, 4255356 + ... + 4565124.

Almost surely, 2^{1366155634560} is an apocalyptic number.

1366155634560 is a gapful number since it is divisible by the number (10) 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 1366155634560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2178265467600).

1366155634560 is an abundant number, since it is smaller than the sum of its proper divisors (2990375300640).

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

1366155634560 is a wasteful number, since it uses less digits than its factorization.

1366155634560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312088 (or 312076 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 51.

The spelling of 1366155634560 in words is "one trillion, three hundred sixty-six billion, one hundred fifty-five million, six hundred thirty-four thousand, five hundred sixty".