261878856882 has 16 divisors (see below), whose sum is σ = 535938126240. Its totient is φ = 85262883552.

The previous prime is 261878856857. The next prime is 261878856907. The reversal of 261878856882 is 288658878162.

It is an interprime number because it is at equal distance from previous prime (261878856857) and next prime (261878856907).

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, 507516907 + ... + 507517422.

It is an arithmetic number, because the mean of its divisors is an integer number (33496132890).

Almost surely, 2^261878856882 is an apocalyptic number.

261878856882 is an abundant number, since it is smaller than the sum of its proper divisors (274059269358).

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

261878856882 is a wasteful number, since it uses less digits than its factorization.

261878856882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015034377.

The product of its digits is 165150720, while the sum is 69.

The spelling of 261878856882 in words is "two hundred sixty-one billion, eight hundred seventy-eight million, eight hundred fifty-six thousand, eight hundred eighty-two".