42491777848 has 32 divisors (see below), whose sum is σ = 90847809360. Its totient is φ = 18457966080.

The previous prime is 42491777843. The next prime is 42491777863. The reversal of 42491777848 is 84877719424.

It is a happy number.

It is a super-2 number, since 2×42491777848² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42491777843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12015138 + ... + 12018673.

Almost surely, 2^42491777848 is an apocalyptic number.

It is an amenable number.

42491777848 is an abundant number, since it is smaller than the sum of its proper divisors (48356031512).

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

42491777848 is a wasteful number, since it uses less digits than its factorization.

42491777848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24033847 (or 24033843 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 61.

The spelling of 42491777848 in words is "forty-two billion, four hundred ninety-one million, seven hundred seventy-seven thousand, eight hundred forty-eight".