42011721016 has 8 divisors (see below), whose sum is σ = 78771976920. Its totient is φ = 21005860504.

The previous prime is 42011720963. The next prime is 42011721029. The reversal of 42011721016 is 61012711024.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2625732556 + ... + 2625732571.

It is an arithmetic number, because the mean of its divisors is an integer number (9846497115).

Almost surely, 2^42011721016 is an apocalyptic number.

It is an amenable number.

42011721016 is a deficient number, since it is larger than the sum of its proper divisors (36760255904).

42011721016 is a wasteful number, since it uses less digits than its factorization.

42011721016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5251465133 (or 5251465129 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The spelling of 42011721016 in words is "forty-two billion, eleven million, seven hundred twenty-one thousand, sixteen".