191862489025 has 12 divisors (see below), whose sum is σ = 237969043312. Its totient is φ = 153451567440.

The previous prime is 191862489017. The next prime is 191862489031. The reversal of 191862489025 is 520984268191.

It is not a de Polignac number, because 191862489025 - 2³ = 191862489017 is a prime.

It is a super-2 number, since 2×191862489025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 858519 + ... + 1058668.

Almost surely, 2^191862489025 is an apocalyptic number.

It is an amenable number.

191862489025 is a deficient number, since it is larger than the sum of its proper divisors (46106554287).

191862489025 is a wasteful number, since it uses less digits than its factorization.

191862489025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921200 (or 1921195 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 55.

The spelling of 191862489025 in words is "one hundred ninety-one billion, eight hundred sixty-two million, four hundred eighty-nine thousand, twenty-five".