7681398912 has 512 divisors, whose sum is σ = 26195558400. Its totient is φ = 2194698240.

The previous prime is 7681398889. The next prime is 7681398929. The reversal of 7681398912 is 2198931867.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60483393 + ... + 60483519.

It is an arithmetic number, because the mean of its divisors is an integer number (51163200).

Almost surely, 2^7681398912 is an apocalyptic number.

7681398912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7681398912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13097779200).

7681398912 is an abundant number, since it is smaller than the sum of its proper divisors (18514159488).

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

7681398912 is a wasteful number, since it uses less digits than its factorization.

7681398912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241 (or 223 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 7681398912 is about 87643.5902505140. The cubic root of 7681398912 is about 1973.0894443329.

The spelling of 7681398912 in words is "seven billion, six hundred eighty-one million, three hundred ninety-eight thousand, nine hundred twelve".