261161263524 has 96 divisors (see below), whose sum is σ = 700251552000. Its totient is φ = 74209190400.

The previous prime is 261161263523. The next prime is 261161263567. The reversal of 261161263524 is 425362161162.

261161263524 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (261161263523) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 11392474 + ... + 11415374.

It is an arithmetic number, because the mean of its divisors is an integer number (7294287000).

Almost surely, 2^261161263524 is an apocalyptic number.

It is an amenable number.

261161263524 is an abundant number, since it is smaller than the sum of its proper divisors (439090288476).

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

261161263524 is a wasteful number, since it uses less digits than its factorization.

261161263524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23653 (or 23651 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The spelling of 261161263524 in words is "two hundred sixty-one billion, one hundred sixty-one million, two hundred sixty-three thousand, five hundred twenty-four".