6981105857513 has 4 divisors (see below), whose sum is σ = 7284632199168. Its totient is φ = 6677579515860.

The previous prime is 6981105857503. The next prime is 6981105857527. The reversal of 6981105857513 is 3157585011896.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6981105857513 - 2⁴² = 2583059346409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6981105857503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151763170793 + ... + 151763170838.

It is an arithmetic number, because the mean of its divisors is an integer number (1821158049792).

Almost surely, 2^{6981105857513} is an apocalyptic number.

It is an amenable number.

6981105857513 is a deficient number, since it is larger than the sum of its proper divisors (303526341655).

6981105857513 is a wasteful number, since it uses less digits than its factorization.

6981105857513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303526341654.

The product of its (nonzero) digits is 9072000, while the sum is 59.

The spelling of 6981105857513 in words is "six trillion, nine hundred eighty-one billion, one hundred five million, eight hundred fifty-seven thousand, five hundred thirteen".