1818920790577 has 4 divisors (see below), whose sum is σ = 1984277226096. Its totient is φ = 1653564355060.

The previous prime is 1818920790551. The next prime is 1818920790611. The reversal of 1818920790577 is 7750970298181.

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 a de Polignac number, because none of the positive numbers 2^k-1818920790577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1818920790377) 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, 82678217743 + ... + 82678217764.

It is an arithmetic number, because the mean of its divisors is an integer number (496069306524).

Almost surely, 2^{1818920790577} is an apocalyptic number.

It is an amenable number.

1818920790577 is a deficient number, since it is larger than the sum of its proper divisors (165356435519).

1818920790577 is a wasteful number, since it uses less digits than its factorization.

1818920790577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165356435518.

The product of its (nonzero) digits is 17781120, while the sum is 64.

The spelling of 1818920790577 in words is "one trillion, eight hundred eighteen billion, nine hundred twenty million, seven hundred ninety thousand, five hundred seventy-seven".