1018495608791 has 4 divisors (see below), whose sum is σ = 1018497872232. Its totient is φ = 1018493345352.

The previous prime is 1018495608659. The next prime is 1018495608797. The reversal of 1018495608791 is 1978065948101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018495608791 is a prime.

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 1018495608791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018495608797) 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, 202361 + ... + 1441506.

It is an arithmetic number, because the mean of its divisors is an integer number (254624468058).

Almost surely, 2^{1018495608791} is an apocalyptic number.

1018495608791 is a deficient number, since it is larger than the sum of its proper divisors (2263441).

1018495608791 is an equidigital number, since it uses as much as digits as its factorization.

1018495608791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263440.

The product of its (nonzero) digits is 4354560, while the sum is 59.

The spelling of 1018495608791 in words is "one trillion, eighteen billion, four hundred ninety-five million, six hundred eight thousand, seven hundred ninety-one".