13785451032321 has 12 divisors (see below), whose sum is σ = 19919093397840. Its totient is φ = 9187173654360.

The previous prime is 13785451032313. The next prime is 13785451032341. The reversal of 13785451032321 is 12323015458731.

13785451032321 is a `hidden beast` number, since 1 + 3 + 7 + 85 + 4 + 510 + 32 + 3 + 21 = 666.

It is not a de Polignac number, because 13785451032321 - 2³ = 13785451032313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13785451032341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 260558235 + ... + 260611136.

It is an arithmetic number, because the mean of its divisors is an integer number (1659924449820).

Almost surely, 2^{13785451032321} is an apocalyptic number.

It is an amenable number.

13785451032321 is a deficient number, since it is larger than the sum of its proper divisors (6133642365519).

13785451032321 is a wasteful number, since it uses less digits than its factorization.

13785451032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521172316 (or 521172313 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 13785451032321 in words is "thirteen trillion, seven hundred eighty-five billion, four hundred fifty-one million, thirty-two thousand, three hundred twenty-one".