11561295491964 has 24 divisors (see below), whose sum is σ = 29973729053520. Its totient is φ = 3853765163952.

The previous prime is 11561295491849. The next prime is 11561295492013. The reversal of 11561295491964 is 46919459216511.

11561295491964 is a `hidden beast` number, since 1 + 1 + 5 + 6 + 1 + 29 + 549 + 1 + 9 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53524516059 + ... + 53524516274.

It is an arithmetic number, because the mean of its divisors is an integer number (1248905377230).

Almost surely, 2^{11561295491964} is an apocalyptic number.

It is an amenable number.

11561295491964 is an abundant number, since it is smaller than the sum of its proper divisors (18412433561556).

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

11561295491964 is a wasteful number, since it uses less digits than its factorization.

11561295491964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107049032346 (or 107049032338 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 63.

The spelling of 11561295491964 in words is "eleven trillion, five hundred sixty-one billion, two hundred ninety-five million, four hundred ninety-one thousand, nine hundred sixty-four".