191314386025 has 27 divisors (see below), whose sum is σ = 275983324869. Its totient is φ = 131176510080.

The previous prime is 191314386023. The next prime is 191314386061. The reversal of 191314386025 is 520683413191.

The square root of 191314386025 is 437395.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2204208601 + 189110177424 = 46949^2 + 434868^2 .

It is not a de Polignac number, because 191314386025 - 2¹ = 191314386023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (191314386023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15302577 + ... + 15315073.

Almost surely, 2^191314386025 is an apocalyptic number.

191314386025 is the 437395-th square number.

191314386025 is the 218698-th centered octagonal number.

It is an amenable number.

191314386025 is a deficient number, since it is larger than the sum of its proper divisors (84668938844).

191314386025 is an frugal number, since it uses more digits than its factorization.

191314386025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25018 (or 12509 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 191314386025 in words is "one hundred ninety-one billion, three hundred fourteen million, three hundred eighty-six thousand, twenty-five".