45537287440 has 80 divisors (see below), whose sum is σ = 107926663680. Its totient is φ = 17864870400.

The previous prime is 45537287423. The next prime is 45537287443. The reversal of 45537287440 is 4478273554.

45537287440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (45537287443) 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, 930462 + ... + 978178.

It is an arithmetic number, because the mean of its divisors is an integer number (1349083296).

Almost surely, 2^45537287440 is an apocalyptic number.

45537287440 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 45537287440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53963331840).

45537287440 is an abundant number, since it is smaller than the sum of its proper divisors (62389376240).

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

45537287440 is a wasteful number, since it uses less digits than its factorization.

45537287440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47960 (or 47954 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 45537287440 in words is "forty-five billion, five hundred thirty-seven million, two hundred eighty-seven thousand, four hundred forty".