261231354424032 has 48 divisors (see below), whose sum is σ = 685762098415632. Its totient is φ = 87073334896640.

The previous prime is 261231354423931. The next prime is 261231354424091. The reversal of 261231354424032 is 230424453132162.

261231354424032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

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, 56891673 + ... + 61311704.

It is an arithmetic number, because the mean of its divisors is an integer number (14286710383659).

Almost surely, 2^{261231354424032} is an apocalyptic number.

It is an amenable number.

261231354424032 is an abundant number, since it is smaller than the sum of its proper divisors (424530743991600).

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

261231354424032 is a wasteful number, since it uses less digits than its factorization.

261231354424032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118226411 (or 118226403 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

The spelling of 261231354424032 in words is "two hundred sixty-one trillion, two hundred thirty-one billion, three hundred fifty-four million, four hundred twenty-four thousand, thirty-two".