191440276616 has 16 divisors (see below), whose sum is σ = 362983671900. Its totient is φ = 94644630784.

The previous prime is 191440276613. The next prime is 191440276649. The reversal of 191440276616 is 616672044191.

It can be written as a sum of positive squares in 2 ways, for example, as 184410124900 + 7030151716 = 429430^2 + 83846^2 .

It is a super-2 number, since 2×191440276616² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191440276613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134437685 + ... + 134439108.

Almost surely, 2^191440276616 is an apocalyptic number.

It is an amenable number.

191440276616 is a deficient number, since it is larger than the sum of its proper divisors (171543395284).

191440276616 is a wasteful number, since it uses less digits than its factorization.

191440276616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268876888 (or 268876884 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 191440276616 in words is "one hundred ninety-one billion, four hundred forty million, two hundred seventy-six thousand, six hundred sixteen".