42491178852 has 12 divisors (see below), whose sum is σ = 99146084016. Its totient is φ = 14163726280.

The previous prime is 42491178823. The next prime is 42491178901. The reversal of 42491178852 is 25887119424.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 42491178795 and 42491178804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1770465774 + ... + 1770465797.

It is an arithmetic number, because the mean of its divisors is an integer number (8262173668).

Almost surely, 2^42491178852 is an apocalyptic number.

It is an amenable number.

42491178852 is an abundant number, since it is smaller than the sum of its proper divisors (56654905164).

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

42491178852 is a wasteful number, since it uses less digits than its factorization.

42491178852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540931578 (or 3540931576 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The spelling of 42491178852 in words is "forty-two billion, four hundred ninety-one million, one hundred seventy-eight thousand, eight hundred fifty-two".