199137878772 has 48 divisors (see below), whose sum is σ = 558983523840. Its totient is φ = 53901981792.

The previous prime is 199137878767. The next prime is 199137878777. The reversal of 199137878772 is 277878731991.

It is an interprime number because it is at equal distance from previous prime (199137878767) and next prime (199137878777).

It is a junction number, because it is equal to n+sod(n) for n = 199137878697 and 199137878706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199137878777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62384958 + ... + 62388149.

It is an arithmetic number, because the mean of its divisors is an integer number (11645490080).

Almost surely, 2^199137878772 is an apocalyptic number.

199137878772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

199137878772 is an abundant number, since it is smaller than the sum of its proper divisors (359845645068).

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

199137878772 is a wasteful number, since it uses less digits than its factorization.

199137878772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124773140 (or 124773138 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 69.

The spelling of 199137878772 in words is "one hundred ninety-nine billion, one hundred thirty-seven million, eight hundred seventy-eight thousand, seven hundred seventy-two".