199392878870 has 32 divisors (see below), whose sum is σ = 366056560800. Its totient is φ = 78171508480.

The previous prime is 199392878851. The next prime is 199392878911. The reversal of 199392878870 is 78878293991.

It is a junction number, because it is equal to n+sod(n) for n = 199392878794 and 199392878803.

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, 320906 + ... + 708354.

It is an arithmetic number, because the mean of its divisors is an integer number (11439267525).

Almost surely, 2^199392878870 is an apocalyptic number.

199392878870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

199392878870 is a deficient number, since it is larger than the sum of its proper divisors (166663681930).

199392878870 is a wasteful number, since it uses less digits than its factorization.

199392878870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388480.

The product of its (nonzero) digits is 109734912, while the sum is 71.

The spelling of 199392878870 in words is "one hundred ninety-nine billion, three hundred ninety-two million, eight hundred seventy-eight thousand, eight hundred seventy".