42844823640 has 160 divisors (see below), whose sum is σ = 144200936880. Its totient is φ = 11409838848.

The previous prime is 42844823633. The next prime is 42844823717. The reversal of 42844823640 is 4632844824.

42844823640 is a `hidden beast` number, since 4 + 284 + 4 + 8 + 2 + 364 + 0 = 666.

It is a super-3 number, since 3×42844823640³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2495967 + ... + 2513073.

Almost surely, 2^42844823640 is an apocalyptic number.

42844823640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42844823640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72100468440).

42844823640 is an abundant number, since it is smaller than the sum of its proper divisors (101356113240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42844823640 is a wasteful number, since it uses less digits than its factorization.

42844823640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17903 (or 17890 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 45.

The spelling of 42844823640 in words is "forty-two billion, eight hundred forty-four million, eight hundred twenty-three thousand, six hundred forty".