261032445920 has 48 divisors (see below), whose sum is σ = 652964992848. Its totient is φ = 98271037440.

The previous prime is 261032445901. The next prime is 261032445931. The reversal of 261032445920 is 29544230162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47981186 + ... + 47986625.

It is an arithmetic number, because the mean of its divisors is an integer number (13603437351).

Almost surely, 2^261032445920 is an apocalyptic number.

261032445920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261032445920 is an abundant number, since it is smaller than the sum of its proper divisors (391932546928).

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

261032445920 is a wasteful number, since it uses less digits than its factorization.

261032445920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95967843 (or 95967835 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 261032445920 in words is "two hundred sixty-one billion, thirty-two million, four hundred forty-five thousand, nine hundred twenty".