42551440000 has 160 divisors (see below), whose sum is σ = 108521152740. Its totient is φ = 16604160000.

The previous prime is 42551439991. The next prime is 42551440081. The reversal of 42551440000 is 4415524.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 27240842304 + 15310597696 = 165048^2 + 123736^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3273514 + ... + 3286486.

Almost surely, 2^42551440000 is an apocalyptic number.

42551440000 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 42551440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54260576370).

42551440000 is an abundant number, since it is smaller than the sum of its proper divisors (65969712740).

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

42551440000 is an equidigital number, since it uses as much as digits as its factorization.

42551440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048 (or 13021 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 42551440000 its reverse (4415524), we get a palindrome (42555855524).

The spelling of 42551440000 in words is "forty-two billion, five hundred fifty-one million, four hundred forty thousand".