261898659248 has 10 divisors (see below), whose sum is σ = 507428652324. Its totient is φ = 130949329616.

The previous prime is 261898659241. The next prime is 261898659251. The reversal of 261898659248 is 842956898162.

261898659248 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 (261898659241) 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 as a sum of consecutive naturals, namely, 8184333086 + ... + 8184333117.

Almost surely, 2^261898659248 is an apocalyptic number.

It is an amenable number.

261898659248 is a deficient number, since it is larger than the sum of its proper divisors (245529993076).

261898659248 is a wasteful number, since it uses less digits than its factorization.

261898659248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368666211 (or 16368666205 counting only the distinct ones).

The product of its digits is 119439360, while the sum is 68.

The spelling of 261898659248 in words is "two hundred sixty-one billion, eight hundred ninety-eight million, six hundred fifty-nine thousand, two hundred forty-eight".