199139973570 has 192 divisors, whose sum is σ = 531196009344. Its totient is φ = 51749268480.

The previous prime is 199139973517. The next prime is 199139973587. The reversal of 199139973570 is 75379931991.

199139973570 is a `hidden beast` number, since 199 + 1 + 3 + 9 + 97 + 357 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 199139973498 and 199139973507.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 192777774 + ... + 192778806.

It is an arithmetic number, because the mean of its divisors is an integer number (2766645882).

Almost surely, 2^199139973570 is an apocalyptic number.

199139973570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 199139973570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265598004672).

199139973570 is an abundant number, since it is smaller than the sum of its proper divisors (332056035774).

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

199139973570 is a wasteful number, since it uses less digits than its factorization.

199139973570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457 (or 1454 counting only the distinct ones).

The product of its (nonzero) digits is 14467005, while the sum is 63.

It can be divided in two parts, 1991399 and 73570, that added together give a square (2064969 = 1437²).

The spelling of 199139973570 in words is "one hundred ninety-nine billion, one hundred thirty-nine million, nine hundred seventy-three thousand, five hundred seventy".