261078808 has 32 divisors (see below), whose sum is σ = 506666160. Its totient is φ = 126023040.

The previous prime is 261078787. The next prime is 261078817. The reversal of 261078808 is 808870162.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 35410 + ... + 42142.

Almost surely, 2^261078808 is an apocalyptic number.

It is an amenable number.

261078808 is a deficient number, since it is larger than the sum of its proper divisors (245587352).

261078808 is a wasteful number, since it uses less digits than its factorization.

261078808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6907 (or 6903 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 261078808 is about 16157.9332836845. The cubic root of 261078808 is about 639.1319677510.

It can be divided in two parts, 2610 and 78808, that added together give a palindrome (81418).

The spelling of 261078808 in words is "two hundred sixty-one million, seventy-eight thousand, eight hundred eight".