261128677932 has 96 divisors (see below), whose sum is σ = 731892403200. Its totient is φ = 80232970176.

The previous prime is 261128677891. The next prime is 261128677961. The reversal of 261128677932 is 239776821162.

It is a happy number.

261128677932 is a `hidden beast` number, since 261 + 1 + 286 + 7 + 79 + 32 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1643748 + ... + 1795595.

It is an arithmetic number, because the mean of its divisors is an integer number (7623879200).

Almost surely, 2^261128677932 is an apocalyptic number.

It is an amenable number.

261128677932 is an abundant number, since it is smaller than the sum of its proper divisors (470763725268).

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

261128677932 is a wasteful number, since it uses less digits than its factorization.

261128677932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439412 (or 3439404 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 261128677932 in words is "two hundred sixty-one billion, one hundred twenty-eight million, six hundred seventy-seven thousand, nine hundred thirty-two".