879771942242 has 6 divisors (see below), whose sum is σ = 1319659903083. Its totient is φ = 439885307882.

The previous prime is 879771942241. The next prime is 879771942271. The reversal of 879771942242 is 242249177978.

It can be written as a sum of positive squares in only one way, i.e., 439885971121 + 439885971121 = 663239^2 + 663239^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=663239.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879771942241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 994859 + ... + 1658097.

Almost surely, 2^879771942242 is an apocalyptic number.

879771942242 is a deficient number, since it is larger than the sum of its proper divisors (439887960841).

879771942242 is an frugal number, since it uses more digits than its factorization.

879771942242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326480 (or 663241 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 62.

The spelling of 879771942242 in words is "eight hundred seventy-nine billion, seven hundred seventy-one million, nine hundred forty-two thousand, two hundred forty-two".