261153124552 has 32 divisors (see below), whose sum is σ = 491051289600. Its totient is φ = 130206270784.

The previous prime is 261153124501. The next prime is 261153124577. The reversal of 261153124552 is 255421351162.

261153124552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21279474 + ... + 21291742.

It is an arithmetic number, because the mean of its divisors is an integer number (15345352800).

Almost surely, 2^261153124552 is an apocalyptic number.

It is an amenable number.

261153124552 is a deficient number, since it is larger than the sum of its proper divisors (229898165048).

261153124552 is a wasteful number, since it uses less digits than its factorization.

261153124552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19605 (or 19601 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The spelling of 261153124552 in words is "two hundred sixty-one billion, one hundred fifty-three million, one hundred twenty-four thousand, five hundred fifty-two".