261266613062100 has 36 divisors (see below), whose sum is σ = 755931400460544. Its totient is φ = 69671096816480.

The previous prime is 261266613062089. The next prime is 261266613062131. The reversal of 261266613062100 is 1260316662162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435444354804 + ... + 435444355403.

Almost surely, 2^{261266613062100} is an apocalyptic number.

261266613062100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261266613062100 is an abundant number, since it is smaller than the sum of its proper divisors (494664787398444).

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

261266613062100 is a wasteful number, since it uses less digits than its factorization.

261266613062100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870888710224 (or 870888710217 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 261266613062100 in words is "two hundred sixty-one trillion, two hundred sixty-six billion, six hundred thirteen million, sixty-two thousand, one hundred".