261862376766 has 16 divisors (see below), whose sum is σ = 525106617600. Its totient is φ = 87057148248.

The previous prime is 261862376753. The next prime is 261862376801. The reversal of 261862376766 is 667673268162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57575206 + ... + 57579753.

It is an arithmetic number, because the mean of its divisors is an integer number (32819163600).

Almost surely, 2^261862376766 is an apocalyptic number.

261862376766 is an abundant number, since it is smaller than the sum of its proper divisors (263244240834).

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

261862376766 is a wasteful number, since it uses less digits than its factorization.

261862376766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115155343.

The product of its digits is 36578304, while the sum is 60.

The spelling of 261862376766 in words is "two hundred sixty-one billion, eight hundred sixty-two million, three hundred seventy-six thousand, seven hundred sixty-six".