42721812724 has 48 divisors (see below), whose sum is σ = 78447600000. Its totient is φ = 20331222912.

The previous prime is 42721812689. The next prime is 42721812761.

42721812724 is nontrivially palindromic in base 10.

42721812724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2507667 + ... + 2524645.

It is an arithmetic number, because the mean of its divisors is an integer number (1634325000).

Almost surely, 2^42721812724 is an apocalyptic number.

It is an amenable number.

42721812724 is a deficient number, since it is larger than the sum of its proper divisors (35725787276).

42721812724 is a wasteful number, since it uses less digits than its factorization.

42721812724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17320 (or 17318 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The spelling of 42721812724 in words is "forty-two billion, seven hundred twenty-one million, eight hundred twelve thousand, seven hundred twenty-four".