1366155213408 has 72 divisors (see below), whose sum is σ = 3891808216296. Its totient is φ = 454587494400.

The previous prime is 1366155213347. The next prime is 1366155213419. The reversal of 1366155213408 is 8043125516631.

1366155213408 is a `hidden beast` number, since 1 + 3 + 6 + 61 + 552 + 1 + 34 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3989313 + ... + 4318208.

It is an arithmetic number, because the mean of its divisors is an integer number (54052891893).

Almost surely, 2^{1366155213408} is an apocalyptic number.

1366155213408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1366155213408 is an abundant number, since it is smaller than the sum of its proper divisors (2525653002888).

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

1366155213408 is a wasteful number, since it uses less digits than its factorization.

1366155213408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8308108 (or 8308097 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 1366155213408 in words is "one trillion, three hundred sixty-six billion, one hundred fifty-five million, two hundred thirteen thousand, four hundred eight".