261920102706 has 24 divisors (see below), whose sum is σ = 568392936384. Its totient is φ = 87168334680.

The previous prime is 261920102699. The next prime is 261920102747. The reversal of 261920102706 is 607201029162.

261920102706 is a `hidden beast` number, since 2 + 619 + 2 + 0 + 10 + 27 + 0 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11518846 + ... + 11541561.

It is an arithmetic number, because the mean of its divisors is an integer number (23683039016).

Almost surely, 2^261920102706 is an apocalyptic number.

261920102706 is an abundant number, since it is smaller than the sum of its proper divisors (306472833678).

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

261920102706 is a wasteful number, since it uses less digits than its factorization.

261920102706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23061046 (or 23061043 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 261920102706 in words is "two hundred sixty-one billion, nine hundred twenty million, one hundred two thousand, seven hundred six".