261311847012 has 48 divisors (see below), whose sum is σ = 677508838720. Its totient is φ = 87099618816.

The previous prime is 261311846963. The next prime is 261311847067. The reversal of 261311847012 is 210748113162.

261311847012 is a `hidden beast` number, since 2 + 61 + 3 + 118 + 470 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2710623 + ... + 2805369.

Almost surely, 2^261311847012 is an apocalyptic number.

It is an amenable number.

261311847012 is an abundant number, since it is smaller than the sum of its proper divisors (416196991708).

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

261311847012 is a wasteful number, since it uses less digits than its factorization.

261311847012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120297 (or 120289 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 261311847012 in words is "two hundred sixty-one billion, three hundred eleven million, eight hundred forty-seven thousand, twelve".