7161281280 has 540 divisors, whose sum is σ = 27334248480. Its totient is φ = 1789820928.

The previous prime is 7161281273. The next prime is 7161281293. The reversal of 7161281280 is 821821617.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 29963401 + ... + 29963639.

Almost surely, 2^7161281280 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 7161281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13667124240).

7161281280 is an abundant number, since it is smaller than the sum of its proper divisors (20172967200).

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

7161281280 is a wasteful number, since it uses less digits than its factorization.

7161281280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 7161281280 is about 84624.3539414039. The cubic root of 7161281280 is about 1927.5112022241.

The spelling of 7161281280 in words is "seven billion, one hundred sixty-one million, two hundred eighty-one thousand, two hundred eighty".