42001999999 has 32 divisors (see below), whose sum is σ = 44934050304. Its totient is φ = 39177768960.

The previous prime is 42001999937. The next prime is 42002000009. The reversal of 42001999999 is 99999910024.

It is a cyclic number.

It is not a de Polignac number, because 42001999999 - 2¹⁷ = 42001868927 is a prime.

It is a Duffinian number.

42001999999 is a modest number, since divided by 999999 gives 42001 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001990999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73558384 + ... + 73558954.

It is an arithmetic number, because the mean of its divisors is an integer number (1404189072).

Almost surely, 2^42001999999 is an apocalyptic number.

42001999999 is a deficient number, since it is larger than the sum of its proper divisors (2932050305).

42001999999 is a wasteful number, since it uses less digits than its factorization.

42001999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087.

The product of its (nonzero) digits is 4251528, while the sum is 61.

The spelling of 42001999999 in words is "forty-two billion, one million, nine hundred ninety-nine thousand, nine hundred ninety-nine".