7865551641480 has 256 divisors, whose sum is σ = 25842305905920. Its totient is φ = 1903503753216.

The previous prime is 7865551641463. The next prime is 7865551641547. The reversal of 7865551641480 is 841461555687.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35534107 + ... + 35754773.

It is an arithmetic number, because the mean of its divisors is an integer number (100946507445).

Almost surely, 2^{7865551641480} 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 7865551641480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12921152952960).

7865551641480 is an abundant number, since it is smaller than the sum of its proper divisors (17976754264440).

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

7865551641480 is a wasteful number, since it uses less digits than its factorization.

7865551641480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221080 (or 221076 counting only the distinct ones).

The product of its (nonzero) digits is 32256000, while the sum is 60.

The spelling of 7865551641480 in words is "seven trillion, eight hundred sixty-five billion, five hundred fifty-one million, six hundred forty-one thousand, four hundred eighty".