7985516155897 has 16 divisors (see below), whose sum is σ = 9328206395520. Its totient is φ = 6694126687872.

The previous prime is 7985516155879. The next prime is 7985516155919.

7985516155897 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 7985516155897 - 2²⁷ = 7985381938169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7985516155847) 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, 34267747 + ... + 34499992.

It is an arithmetic number, because the mean of its divisors is an integer number (583012899720).

Almost surely, 2^{7985516155897} is an apocalyptic number.

It is an amenable number.

7985516155897 is a deficient number, since it is larger than the sum of its proper divisors (1342690239623).

7985516155897 is a wasteful number, since it uses less digits than its factorization.

7985516155897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68768112.

The product of its digits is 952560000, while the sum is 76.

The spelling of 7985516155897 in words is "seven trillion, nine hundred eighty-five billion, five hundred sixteen million, one hundred fifty-five thousand, eight hundred ninety-seven".