7997853538511 has 8 divisors (see below), whose sum is σ = 8005832802240. Its totient is φ = 7989877919232.

The previous prime is 7997853538483. The next prime is 7997853538513. The reversal of 7997853538511 is 1158353587997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7997853538511 - 2⁶ = 7997853538447 is a prime.

It is a super-2 number, since 2×7997853538511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997853538513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3490730 + ... + 5308568.

It is an arithmetic number, because the mean of its divisors is an integer number (1000729100280).

Almost surely, 2^{7997853538511} is an apocalyptic number.

7997853538511 is a deficient number, since it is larger than the sum of its proper divisors (7979263729).

7997853538511 is a wasteful number, since it uses less digits than its factorization.

7997853538511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822225.

The product of its digits is 285768000, while the sum is 71.

The spelling of 7997853538511 in words is "seven trillion, nine hundred ninety-seven billion, eight hundred fifty-three million, five hundred thirty-eight thousand, five hundred eleven".