868781155 has 8 divisors (see below), whose sum is σ = 1137313584. Its totient is φ = 631840800.

The previous prime is 868781153. The next prime is 868781167. The reversal of 868781155 is 551187868.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 868781155 - 2¹ = 868781153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 868781099 and 868781108.

It is not an unprimeable number, because it can be changed into a prime (868781153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7897956 + ... + 7898065.

It is an arithmetic number, because the mean of its divisors is an integer number (142164198).

Almost surely, 2^868781155 is an apocalyptic number.

868781155 is a deficient number, since it is larger than the sum of its proper divisors (268532429).

868781155 is a wasteful number, since it uses less digits than its factorization.

868781155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15796037.

The product of its digits is 537600, while the sum is 49.

The square root of 868781155 is about 29475.0938081629. The cubic root of 868781155 is about 954.1942547234.

The spelling of 868781155 in words is "eight hundred sixty-eight million, seven hundred eighty-one thousand, one hundred fifty-five".