199725687672 has 32 divisors (see below), whose sum is σ = 570644822400. Its totient is φ = 57064482144.

The previous prime is 199725687659. The next prime is 199725687703. The reversal of 199725687672 is 276786527991.

It is a junction number, because it is equal to n+sod(n) for n = 199725687597 and 199725687606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594421522 + ... + 594421857.

It is an arithmetic number, because the mean of its divisors is an integer number (17832650700).

Almost surely, 2^199725687672 is an apocalyptic number.

199725687672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199725687672 is an abundant number, since it is smaller than the sum of its proper divisors (370919134728).

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

199725687672 is a wasteful number, since it uses less digits than its factorization.

199725687672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188843395 (or 1188843391 counting only the distinct ones).

The product of its digits is 160030080, while the sum is 69.

The spelling of 199725687672 in words is "one hundred ninety-nine billion, seven hundred twenty-five million, six hundred eighty-seven thousand, six hundred seventy-two".