42738760821 has 16 divisors (see below), whose sum is σ = 57790897920. Its totient is φ = 28089907200.

The previous prime is 42738760811. The next prime is 42738760837. The reversal of 42738760821 is 12806783724.

It is not a de Polignac number, because 42738760821 - 2⁷ = 42738760693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42738760811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473365 + ... + 556373.

It is an arithmetic number, because the mean of its divisors is an integer number (3611931120).

Almost surely, 2^42738760821 is an apocalyptic number.

It is an amenable number.

42738760821 is a deficient number, since it is larger than the sum of its proper divisors (15052137099).

42738760821 is a wasteful number, since it uses less digits than its factorization.

42738760821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85436.

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 42738760821 in words is "forty-two billion, seven hundred thirty-eight million, seven hundred sixty thousand, eight hundred twenty-one".