13537897991828 has 96 divisors (see below), whose sum is σ = 27264384000000. Its totient is φ = 5761703630592.

The previous prime is 13537897991809. The next prime is 13537897991881. The reversal of 13537897991828 is 82819979873531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6449688323 + ... + 6449690421.

It is an arithmetic number, because the mean of its divisors is an integer number (284004000000).

Almost surely, 2^{13537897991828} is an apocalyptic number.

It is an amenable number.

13537897991828 is an abundant number, since it is smaller than the sum of its proper divisors (13726486008172).

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

13537897991828 is a wasteful number, since it uses less digits than its factorization.

13537897991828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4555 counting only the distinct ones).

The product of its digits is 1646023680, while the sum is 80.

The spelling of 13537897991828 in words is "thirteen trillion, five hundred thirty-seven billion, eight hundred ninety-seven million, nine hundred ninety-one thousand, eight hundred twenty-eight".