1817126049 has 4 divisors (see below), whose sum is σ = 2422834736. Its totient is φ = 1211417364.

The previous prime is 1817125969. The next prime is 1817126053. The reversal of 1817126049 is 9406217181.

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 de Polignac number, because none of the positive numbers 2^k-1817126049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1817125998 and 1817126016.

It is not an unprimeable number, because it can be changed into a prime (1817126099) 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, 302854339 + ... + 302854344.

It is an arithmetic number, because the mean of its divisors is an integer number (605708684).

Almost surely, 2^1817126049 is an apocalyptic number.

It is an amenable number.

1817126049 is a deficient number, since it is larger than the sum of its proper divisors (605708687).

1817126049 is an equidigital number, since it uses as much as digits as its factorization.

1817126049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605708686.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1817126049 is about 42627.7614823955. The cubic root of 1817126049 is about 1220.2861572324.

The spelling of 1817126049 in words is "one billion, eight hundred seventeen million, one hundred twenty-six thousand, forty-nine".