7800775800 has 96 divisors (see below), whose sum is σ = 24344982000. Its totient is φ = 2066222080.

The previous prime is 7800775769. The next prime is 7800775837. The reversal of 7800775800 is 85770087.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45772 + ... + 133028.

Almost surely, 2^7800775800 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 7800775800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12172491000).

7800775800 is an abundant number, since it is smaller than the sum of its proper divisors (16544206200).

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

7800775800 is a wasteful number, since it uses less digits than its factorization.

7800775800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87425 (or 87416 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 42.

The square root of 7800775800 is about 88322.0006566880. Note that the first 3 decimals coincide. The cubic root of 7800775800 is about 1983.2582309595.

The spelling of 7800775800 in words is "seven billion, eight hundred million, seven hundred seventy-five thousand, eight hundred".