1798808138172 has 48 divisors (see below), whose sum is σ = 4722609292800. Its totient is φ = 592012802160.

The previous prime is 1798808138167. The next prime is 1798808138189. The reversal of 1798808138172 is 2718318088971.

1798808138172 is a `hidden beast` number, since 17 + 98 + 80 + 81 + 381 + 7 + 2 = 666.

It is a congruent number.

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, 105406854 + ... + 105423917.

It is an arithmetic number, because the mean of its divisors is an integer number (98387693600).

Almost surely, 2^{1798808138172} is an apocalyptic number.

1798808138172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1798808138172 is an abundant number, since it is smaller than the sum of its proper divisors (2923801154628).

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

1798808138172 is a wasteful number, since it uses less digits than its factorization.

1798808138172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210830863 (or 210830855 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 63.

The spelling of 1798808138172 in words is "one trillion, seven hundred ninety-eight billion, eight hundred eight million, one hundred thirty-eight thousand, one hundred seventy-two".