878162251561242 has 16 divisors (see below), whose sum is σ = 1756563491440800. Its totient is φ = 292680919134032.

The previous prime is 878162251561201. The next prime is 878162251561247. The reversal of 878162251561242 is 242165152261878.

It is a super-2 number, since 2×878162251561242² (a number of 31 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (878162251561247) 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, 9957798828 + ... + 9957887015.

It is an arithmetic number, because the mean of its divisors is an integer number (109785218215050).

Almost surely, 2^{878162251561242} is an apocalyptic number.

878162251561242 is an abundant number, since it is smaller than the sum of its proper divisors (878401239879558).

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

878162251561242 is a wasteful number, since it uses less digits than its factorization.

878162251561242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19915693197.

The product of its digits is 25804800, while the sum is 60.

The spelling of 878162251561242 in words is "eight hundred seventy-eight trillion, one hundred sixty-two billion, two hundred fifty-one million, five hundred sixty-one thousand, two hundred forty-two".