7782799968 has 72 divisors (see below), whose sum is σ = 22328292168. Its totient is φ = 2571297792.

The previous prime is 7782799967. The next prime is 7782799979. The reversal of 7782799968 is 8699972877.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 7782799896 and 7782799905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7782799967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87030 + ... + 152117.

It is an arithmetic number, because the mean of its divisors is an integer number (310115169).

Almost surely, 2^7782799968 is an apocalyptic number.

It is an amenable number.

7782799968 is an abundant number, since it is smaller than the sum of its proper divisors (14545492200).

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

7782799968 is a wasteful number, since it uses less digits than its factorization.

7782799968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239276 (or 239265 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 72.

The square root of 7782799968 is about 88220.1789161641. The cubic root of 7782799968 is about 1981.7336759288.

The spelling of 7782799968 in words is "seven billion, seven hundred eighty-two million, seven hundred ninety-nine thousand, nine hundred sixty-eight".