261636232265252 has 48 divisors (see below), whose sum is σ = 496636385481600. Its totient is φ = 119885149716480.

The previous prime is 261636232265237. The next prime is 261636232265323. The reversal of 261636232265252 is 252562232636162.

It is a junction number, because it is equal to n+sod(n) for n = 261636232265194 and 261636232265203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1098818852 + ... + 1099056932.

It is an arithmetic number, because the mean of its divisors is an integer number (10346591364200).

Almost surely, 2^{261636232265252} is an apocalyptic number.

It is an amenable number.

261636232265252 is a deficient number, since it is larger than the sum of its proper divisors (235000153216348).

261636232265252 is a wasteful number, since it uses less digits than its factorization.

261636232265252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390276 (or 390274 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 53.

The spelling of 261636232265252 in words is "two hundred sixty-one trillion, six hundred thirty-six billion, two hundred thirty-two million, two hundred sixty-five thousand, two hundred fifty-two".