13680155780449 has 32 divisors (see below), whose sum is σ = 14487416697600. Its totient is φ = 12881923050240.

The previous prime is 13680155780437. The next prime is 13680155780491. The reversal of 13680155780449 is 94408755108631.

It is a cyclic number.

It is not a de Polignac number, because 13680155780449 - 2³¹ = 13678008296801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13680155780849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3889721239 + ... + 3889724755.

It is an arithmetic number, because the mean of its divisors is an integer number (452731771800).

Almost surely, 2^{13680155780449} is an apocalyptic number.

13680155780449 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13680155780449 is a deficient number, since it is larger than the sum of its proper divisors (807260917151).

13680155780449 is a wasteful number, since it uses less digits than its factorization.

13680155780449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5593.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 13680155780449 in words is "thirteen trillion, six hundred eighty billion, one hundred fifty-five million, seven hundred eighty thousand, four hundred forty-nine".