994557642163291 has 4 divisors (see below), whose sum is σ = 1028852733272400. Its totient is φ = 960262551054184.

The previous prime is 994557642163249. The next prime is 994557642163301. The reversal of 994557642163291 is 192361246755499.

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 994557642163291 - 2¹¹ = 994557642161243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994557642169291) 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, 17147545554511 + ... + 17147545554568.

It is an arithmetic number, because the mean of its divisors is an integer number (257213183318100).

Almost surely, 2^{994557642163291} is an apocalyptic number.

994557642163291 is a deficient number, since it is larger than the sum of its proper divisors (34295091109109).

994557642163291 is a wasteful number, since it uses less digits than its factorization.

994557642163291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34295091109108.

The product of its digits is 881798400, while the sum is 73.

The spelling of 994557642163291 in words is "nine hundred ninety-four trillion, five hundred fifty-seven billion, six hundred forty-two million, one hundred sixty-three thousand, two hundred ninety-one".