199513106554 has 4 divisors (see below), whose sum is σ = 299269659834. Its totient is φ = 99756553276.

The previous prime is 199513106549. The next prime is 199513106563. The reversal of 199513106554 is 455601315991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131096857329 + 68416249225 = 362073^2 + 261565^2 .

It is a junction number, because it is equal to n+sod(n) for n = 199513106498 and 199513106507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49878276637 + ... + 49878276640.

Almost surely, 2^199513106554 is an apocalyptic number.

199513106554 is a deficient number, since it is larger than the sum of its proper divisors (99756553280).

199513106554 is an equidigital number, since it uses as much as digits as its factorization.

199513106554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99756553279.

The product of its (nonzero) digits is 729000, while the sum is 49.

The spelling of 199513106554 in words is "one hundred ninety-nine billion, five hundred thirteen million, one hundred six thousand, five hundred fifty-four".