5515591079040 has 1024 divisors, whose sum is σ = 20773767168000. Its totient is φ = 1218890612736.

The previous prime is 5515591079021. The next prime is 5515591079057. The reversal of 5515591079040 is 409701955155.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 17966094567 + ... + 17966094873.

It is an arithmetic number, because the mean of its divisors is an integer number (20286882000).

Almost surely, 2^{5515591079040} 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 5515591079040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10386883584000).

5515591079040 is an abundant number, since it is smaller than the sum of its proper divisors (15258176088960).

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

5515591079040 is a wasteful number, since it uses less digits than its factorization.

5515591079040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 1417500, while the sum is 51.

The spelling of 5515591079040 in words is "five trillion, five hundred fifteen billion, five hundred ninety-one million, seventy-nine thousand, forty".