261832787912 has 16 divisors (see below), whose sum is σ = 516775239600. Its totient is φ = 124026057360.

The previous prime is 261832787897. The next prime is 261832787939. The reversal of 261832787912 is 219787238162.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861291914 + ... + 861292217.

It is an arithmetic number, because the mean of its divisors is an integer number (32298452475).

Almost surely, 2^261832787912 is an apocalyptic number.

It is an amenable number.

261832787912 is a deficient number, since it is larger than the sum of its proper divisors (254942451688).

261832787912 is a wasteful number, since it uses less digits than its factorization.

261832787912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722584156 (or 1722584152 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 56.

The spelling of 261832787912 in words is "two hundred sixty-one billion, eight hundred thirty-two million, seven hundred eighty-seven thousand, nine hundred twelve".