13219645387536 has 60 divisors (see below), whose sum is σ = 42281881679232. Its totient is φ = 3777041539008.

The previous prime is 13219645387517. The next prime is 13219645387591. The reversal of 13219645387536 is 63578354691231.

It is a happy number.

13219645387536 is a `hidden beast` number, since 1 + 3 + 2 + 1 + 9 + 64 + 5 + 38 + 7 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 6557362776 + ... + 6557364791.

Almost surely, 2^{13219645387536} is an apocalyptic number.

13219645387536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13219645387536 is an abundant number, since it is smaller than the sum of its proper divisors (29062236291696).

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

13219645387536 is a wasteful number, since it uses less digits than its factorization.

13219645387536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13114727588 (or 13114727579 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 63.

The spelling of 13219645387536 in words is "thirteen trillion, two hundred nineteen billion, six hundred forty-five million, three hundred eighty-seven thousand, five hundred thirty-six".