13664509035820 has 48 divisors (see below), whose sum is σ = 28768007072448. Its totient is φ = 5451998549760.

The previous prime is 13664509035809. The next prime is 13664509035833. The reversal of 13664509035820 is 2853090546631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18356722 + ... + 19086598.

It is an arithmetic number, because the mean of its divisors is an integer number (599333480676).

Almost surely, 2^{13664509035820} is an apocalyptic number.

13664509035820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13664509035820 is an abundant number, since it is smaller than the sum of its proper divisors (15103498036628).

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

13664509035820 is a wasteful number, since it uses less digits than its factorization.

13664509035820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732250 (or 732248 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 52.

The spelling of 13664509035820 in words is "thirteen trillion, six hundred sixty-four billion, five hundred nine million, thirty-five thousand, eight hundred twenty".