191265449648 has 40 divisors (see below), whose sum is σ = 456094537248. Its totient is φ = 75665452032.

The previous prime is 191265449621. The next prime is 191265449689. The reversal of 191265449648 is 846944562191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65680361 + ... + 65683272.

Almost surely, 2^191265449648 is an apocalyptic number.

It is an amenable number.

191265449648 is an abundant number, since it is smaller than the sum of its proper divisors (264829087600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191265449648 is a wasteful number, since it uses less digits than its factorization.

191265449648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131363661 (or 131363655 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 59.

The spelling of 191265449648 in words is "one hundred ninety-one billion, two hundred sixty-five million, four hundred forty-nine thousand, six hundred forty-eight".