7800007776 has 96 divisors (see below), whose sum is σ = 22363060608. Its totient is φ = 2360816640.

The previous prime is 7800007769. The next prime is 7800007801. The reversal of 7800007776 is 6777000087.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985531 + ... + 993413.

It is an arithmetic number, because the mean of its divisors is an integer number (232948548).

Almost surely, 2^7800007776 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 7800007776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11181530304).

7800007776 is an abundant number, since it is smaller than the sum of its proper divisors (14563052832).

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

7800007776 is a wasteful number, since it uses less digits than its factorization.

7800007776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844 (or 8836 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 42.

The square root of 7800007776 is about 88317.6526861986. The cubic root of 7800007776 is about 1983.1931417107.

The spelling of 7800007776 in words is "seven billion, eight hundred million, seven thousand, seven hundred seventy-six".