42820861916 has 12 divisors (see below), whose sum is σ = 85641723888. Its totient is φ = 18351797952.

The previous prime is 42820861913. The next prime is 42820861921. The reversal of 42820861916 is 61916802824.

42820861916 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42820861913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764658221 + ... + 764658276.

It is an arithmetic number, because the mean of its divisors is an integer number (7136810324).

Almost surely, 2^42820861916 is an apocalyptic number.

It is an amenable number.

42820861916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42820861916 is a wasteful number, since it uses less digits than its factorization.

42820861916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529316508 (or 1529316506 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 42820861916 in words is "forty-two billion, eight hundred twenty million, eight hundred sixty-one thousand, nine hundred sixteen".