5481572640 has 96 divisors (see below), whose sum is σ = 17373134016. Its totient is φ = 1452764160.

The previous prime is 5481572617. The next prime is 5481572651. The reversal of 5481572640 is 462751845.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 5481572592 and 5481572601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43210 + ... + 113270.

It is an arithmetic number, because the mean of its divisors is an integer number (180970146).

Almost surely, 2^5481572640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5481572640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8686567008).

5481572640 is an abundant number, since it is smaller than the sum of its proper divisors (11891561376).

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

5481572640 is a wasteful number, since it uses less digits than its factorization.

5481572640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70242 (or 70234 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 5481572640 is about 74037.6433984767. The cubic root of 5481572640 is about 1763.2005982905.

The spelling of 5481572640 in words is "five billion, four hundred eighty-one million, five hundred seventy-two thousand, six hundred forty".