7998653215 has 16 divisors (see below), whose sum is σ = 11005327872. Its totient is φ = 5466917664.

The previous prime is 7998653197. The next prime is 7998653219. The reversal of 7998653215 is 5123568997.

It is a cyclic number.

It is not a de Polignac number, because 7998653215 - 2⁹ = 7998652703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998653219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361459 + ... + 382948.

It is an arithmetic number, because the mean of its divisors is an integer number (687832992).

Almost surely, 2^7998653215 is an apocalyptic number.

7998653215 is a deficient number, since it is larger than the sum of its proper divisors (3006674657).

7998653215 is a wasteful number, since it uses less digits than its factorization.

7998653215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744726.

The product of its digits is 4082400, while the sum is 55.

The square root of 7998653215 is about 89435.1900260742. The cubic root of 7998653215 is about 1999.8877616181.

The spelling of 7998653215 in words is "seven billion, nine hundred ninety-eight million, six hundred fifty-three thousand, two hundred fifteen".