191434251025 has 12 divisors (see below), whose sum is σ = 237844849500. Its totient is φ = 152846511680.

The previous prime is 191434250977. The next prime is 191434251101. The reversal of 191434251025 is 520152434191.

191434251025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 437532²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 15008210064 + 176426040961 = 122508^2 + 420031^2 .

It is not a de Polignac number, because 191434251025 - 2⁷ = 191434250897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7509250 + ... + 7534699.

It is an arithmetic number, because the mean of its divisors is an integer number (19820404125).

Almost surely, 2^191434251025 is an apocalyptic number.

It is an amenable number.

191434251025 is a deficient number, since it is larger than the sum of its proper divisors (46410598475).

191434251025 is a wasteful number, since it uses less digits than its factorization.

191434251025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15044468 (or 15044463 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 191434251025 in words is "one hundred ninety-one billion, four hundred thirty-four million, two hundred fifty-one thousand, twenty-five".