42506543440 has 40 divisors (see below), whose sum is σ = 98851206600. Its totient is φ = 16998575616.

The previous prime is 42506543393. The next prime is 42506543467. The reversal of 42506543440 is 4434560524.

It can be written as a sum of positive squares in 4 ways, for example, as 10373829904 + 32132713536 = 101852^2 + 179256^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 42506543440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287586 + ... + 409534.

It is an arithmetic number, because the mean of its divisors is an integer number (2471280165).

Almost surely, 2^42506543440 is an apocalyptic number.

42506543440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42506543440 is an abundant number, since it is smaller than the sum of its proper divisors (56344663160).

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

42506543440 is a wasteful number, since it uses less digits than its factorization.

42506543440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126319 (or 126313 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

The spelling of 42506543440 in words is "forty-two billion, five hundred six million, five hundred forty-three thousand, four hundred forty".