261263213586616 has 16 divisors (see below), whose sum is σ = 489869458018200. Its totient is φ = 130631358115104.

The previous prime is 261263213586593. The next prime is 261263213586679. The reversal of 261263213586616 is 616685312362162.

It is a happy number.

261263213586616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26581315 + ... + 35058418.

Almost surely, 2^{261263213586616} is an apocalyptic number.

It is an amenable number.

261263213586616 is a deficient number, since it is larger than the sum of its proper divisors (228606244431584).

261263213586616 is a wasteful number, since it uses less digits than its factorization.

261263213586616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62169558 (or 62169554 counting only the distinct ones).

The product of its digits is 22394880, while the sum is 58.

The spelling of 261263213586616 in words is "two hundred sixty-one trillion, two hundred sixty-three billion, two hundred thirteen million, five hundred eighty-six thousand, six hundred sixteen".