7898782356815 has 192 divisors, whose sum is σ = 11804907921408. Its totient is φ = 5050360627200.

The previous prime is 7898782356697. The next prime is 7898782356833. The reversal of 7898782356815 is 5186532878987.

It is not a de Polignac number, because 7898782356815 - 2²⁰ = 7898781308239 is a prime.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10036571852 + ... + 10036572638.

It is an arithmetic number, because the mean of its divisors is an integer number (61483895424).

Almost surely, 2^{7898782356815} is an apocalyptic number.

7898782356815 is a deficient number, since it is larger than the sum of its proper divisors (3906125564593).

7898782356815 is a wasteful number, since it uses less digits than its factorization.

7898782356815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1231 counting only the distinct ones).

The product of its digits is 1625702400, while the sum is 77.

The spelling of 7898782356815 in words is "seven trillion, eight hundred ninety-eight billion, seven hundred eighty-two million, three hundred fifty-six thousand, eight hundred fifteen".