199975575477 has 4 divisors (see below), whose sum is σ = 266634100640. Its totient is φ = 133317050316.

The previous prime is 199975575469. The next prime is 199975575511. The reversal of 199975575477 is 774575579991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 199975575477 - 2³ = 199975575469 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199975575399 and 199975575408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199975575467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33329262577 + ... + 33329262582.

It is an arithmetic number, because the mean of its divisors is an integer number (66658525160).

Almost surely, 2^199975575477 is an apocalyptic number.

It is an amenable number.

199975575477 is a deficient number, since it is larger than the sum of its proper divisors (66658525163).

199975575477 is an equidigital number, since it uses as much as digits as its factorization.

199975575477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66658525162.

The product of its digits is 875164500, while the sum is 75.

The spelling of 199975575477 in words is "one hundred ninety-nine billion, nine hundred seventy-five million, five hundred seventy-five thousand, four hundred seventy-seven".