18170728612848 has 320 divisors, whose sum is σ = 60500099174400. Its totient is φ = 5114341140480.

The previous prime is 18170728612783. The next prime is 18170728612859. The reversal of 18170728612848 is 84821682707181.

18170728612848 is a `hidden beast` number, since 1 + 8 + 1 + 7 + 0 + 7 + 2 + 8 + 612 + 8 + 4 + 8 = 666.

It is a super-2 number, since 2×18170728612848² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72811290 + ... + 73060422.

It is an arithmetic number, because the mean of its divisors is an integer number (189062809920).

Almost surely, 2^{18170728612848} is an apocalyptic number.

18170728612848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18170728612848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30250049587200).

18170728612848 is an abundant number, since it is smaller than the sum of its proper divisors (42329370561552).

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

18170728612848 is a wasteful number, since it uses less digits than its factorization.

18170728612848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249517 (or 249505 counting only the distinct ones).

The product of its (nonzero) digits is 19267584, while the sum is 63.

The spelling of 18170728612848 in words is "eighteen trillion, one hundred seventy billion, seven hundred twenty-eight million, six hundred twelve thousand, eight hundred forty-eight".