9557961673919 has 4 divisors (see below), whose sum is σ = 9578876251344. Its totient is φ = 9537047096496.

The previous prime is 9557961673891. The next prime is 9557961673927. The reversal of 9557961673919 is 9193761697559.

9557961673919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9557961673919 - 2⁴⁰ = 8458450046143 is a prime.

It is a super-2 number, since 2×9557961673919² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9557961673919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9557961673969) 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, 10457288027 + ... + 10457288940.

It is an arithmetic number, because the mean of its divisors is an integer number (2394719062836).

Almost surely, 2^{9557961673919} is an apocalyptic number.

9557961673919 is a deficient number, since it is larger than the sum of its proper divisors (20914577425).

9557961673919 is a wasteful number, since it uses less digits than its factorization.

9557961673919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20914577424.

The product of its digits is 868020300, while the sum is 77.

The spelling of 9557961673919 in words is "nine trillion, five hundred fifty-seven billion, nine hundred sixty-one million, six hundred seventy-three thousand, nine hundred nineteen".