42091759021 has 16 divisors (see below), whose sum is σ = 45680277888. Its totient is φ = 38553912000.

The previous prime is 42091759013. The next prime is 42091759037. The reversal of 42091759021 is 12095719024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42091759021 - 2³ = 42091759013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42091759091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1835790 + ... + 1858576.

It is an arithmetic number, because the mean of its divisors is an integer number (2855017368).

Almost surely, 2^42091759021 is an apocalyptic number.

It is an amenable number.

42091759021 is a deficient number, since it is larger than the sum of its proper divisors (3588518867).

42091759021 is a wasteful number, since it uses less digits than its factorization.

42091759021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23892.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 42091759021 in words is "forty-two billion, ninety-one million, seven hundred fifty-nine thousand, twenty-one".