868228178531 has 12 divisors (see below), whose sum is σ = 1009996479360. Its totient is φ = 744183231120.

The previous prime is 868228178513. The next prime is 868228178557. The reversal of 868228178531 is 135871822868.

It is a de Polignac number, because none of the positive numbers 2^k-868228178531 is a prime.

It is a super-2 number, since 2×868228178531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868228178581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4040126 + ... + 4249596.

It is an arithmetic number, because the mean of its divisors is an integer number (84166373280).

Almost surely, 2^868228178531 is an apocalyptic number.

868228178531 is a deficient number, since it is larger than the sum of its proper divisors (141768300829).

868228178531 is a wasteful number, since it uses less digits than its factorization.

868228178531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294074 (or 294067 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 59.

The spelling of 868228178531 in words is "eight hundred sixty-eight billion, two hundred twenty-eight million, one hundred seventy-eight thousand, five hundred thirty-one".