261011008678 has 32 divisors (see below), whose sum is σ = 449929673280. Its totient is φ = 111241728000.

The previous prime is 261011008669. The next prime is 261011008681. The reversal of 261011008678 is 876800110162.

It is a super-2 number, since 2×261011008678² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261011008678.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8092608 + ... + 8124796.

It is an arithmetic number, because the mean of its divisors is an integer number (14060302290).

Almost surely, 2^261011008678 is an apocalyptic number.

261011008678 is a deficient number, since it is larger than the sum of its proper divisors (188918664602).

261011008678 is a wasteful number, since it uses less digits than its factorization.

261011008678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35392.

The product of its (nonzero) digits is 32256, while the sum is 40.

The spelling of 261011008678 in words is "two hundred sixty-one billion, eleven million, eight thousand, six hundred seventy-eight".