199729121944375 has 20 divisors (see below), whose sum is σ = 256326957048712. Its totient is φ = 155464830036000.

The previous prime is 199729121944327. The next prime is 199729121944393. The reversal of 199729121944375 is 573449121927991.

It is not a de Polignac number, because 199729121944375 - 2³⁹ = 199179366130487 is a prime.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199729121944298 and 199729121944307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4318444377 + ... + 4318490626.

Almost surely, 2^{199729121944375} is an apocalyptic number.

199729121944375 is a deficient number, since it is larger than the sum of its proper divisors (56597835104337).

199729121944375 is an frugal number, since it uses more digits than its factorization.

199729121944375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636935060 (or 8636935045 counting only the distinct ones).

The product of its digits is 308629440, while the sum is 73.

The spelling of 199729121944375 in words is "one hundred ninety-nine trillion, seven hundred twenty-nine billion, one hundred twenty-one million, nine hundred forty-four thousand, three hundred seventy-five".