42005651444 has 12 divisors (see below), whose sum is σ = 75302814468. Its totient is φ = 20490561600.

The previous prime is 42005651423. The next prime is 42005651461. The reversal of 42005651444 is 44415650024.

It can be written as a sum of positive squares in 2 ways, for example, as 6525408400 + 35480243044 = 80780^2 + 188362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128065847 + ... + 128066174.

It is an arithmetic number, because the mean of its divisors is an integer number (6275234539).

Almost surely, 2^42005651444 is an apocalyptic number.

It is an amenable number.

42005651444 is a deficient number, since it is larger than the sum of its proper divisors (33297163024).

42005651444 is a wasteful number, since it uses less digits than its factorization.

42005651444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256132066 (or 256132064 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 42005651444 in words is "forty-two billion, five million, six hundred fifty-one thousand, four hundred forty-four".