42879198991878 has 24 divisors (see below), whose sum is σ = 93207553086648. Its totient is φ = 14246509109472.

The previous prime is 42879198991829. The next prime is 42879198991891. The reversal of 42879198991878 is 87819989197824.

It is a happy number.

42879198991878 is a `hidden beast` number, since 4 + 287 + 91 + 9 + 89 + 91 + 87 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3879762751 + ... + 3879773802.

It is an arithmetic number, because the mean of its divisors is an integer number (3883648045277).

Almost surely, 2^{42879198991878} is an apocalyptic number.

42879198991878 is an abundant number, since it is smaller than the sum of its proper divisors (50328354094770).

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

42879198991878 is a wasteful number, since it uses less digits than its factorization.

42879198991878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7759536868 (or 7759536865 counting only the distinct ones).

The product of its digits is 10534551552, while the sum is 90.

The spelling of 42879198991878 in words is "forty-two trillion, eight hundred seventy-nine billion, one hundred ninety-eight million, nine hundred ninety-one thousand, eight hundred seventy-eight".