13766221185550 has 12 divisors (see below), whose sum is σ = 25605171405216. Its totient is φ = 5506488474200.

The previous prime is 13766221185503. The next prime is 13766221185581. The reversal of 13766221185550 is 5558112266731.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137662211806 + ... + 137662211905.

It is an arithmetic number, because the mean of its divisors is an integer number (2133764283768).

Almost surely, 2^{13766221185550} is an apocalyptic number.

13766221185550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13766221185550 is a deficient number, since it is larger than the sum of its proper divisors (11838950219666).

13766221185550 is a wasteful number, since it uses less digits than its factorization.

13766221185550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275324423723 (or 275324423718 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 52.

The spelling of 13766221185550 in words is "thirteen trillion, seven hundred sixty-six billion, two hundred twenty-one million, one hundred eighty-five thousand, five hundred fifty".