8402718321 has 12 divisors (see below), whose sum is σ = 12140389248. Its totient is φ = 5600367864.

The previous prime is 8402718293. The next prime is 8402718323. The reversal of 8402718321 is 1238172048.

It is not a de Polignac number, because 8402718321 - 2⁶ = 8402718257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8402718323) 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, 82905 + ... + 153878.

It is an arithmetic number, because the mean of its divisors is an integer number (1011699104).

Almost surely, 2^8402718321 is an apocalyptic number.

It is an amenable number.

8402718321 is a deficient number, since it is larger than the sum of its proper divisors (3737670927).

8402718321 is a wasteful number, since it uses less digits than its factorization.

8402718321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240732 (or 240729 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 8402718321 is about 91666.3423563960. The cubic root of 8402718321 is about 2033.0119670886.

The spelling of 8402718321 in words is "eight billion, four hundred two million, seven hundred eighteen thousand, three hundred twenty-one".