1845115481 has 16 divisors (see below), whose sum is σ = 2052787968. Its totient is φ = 1644411600.

The previous prime is 1845115469. The next prime is 1845115483.

1845115481 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1845115481 - 2¹⁰ = 1845114457 is a prime.

It is a super-2 number, since 2×1845115481² = 6808902276451722722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1845115483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111890 + ... + 127316.

It is an arithmetic number, because the mean of its divisors is an integer number (128299248).

Almost surely, 2^1845115481 is an apocalyptic number.

1845115481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1845115481 is a deficient number, since it is larger than the sum of its proper divisors (207672487).

1845115481 is a wasteful number, since it uses less digits than its factorization.

1845115481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15652.

The product of its digits is 25600, while the sum is 38.

The square root of 1845115481 is about 42954.8074259448. The cubic root of 1845115481 is about 1226.5196702383.

The spelling of 1845115481 in words is "one billion, eight hundred forty-five million, one hundred fifteen thousand, four hundred eighty-one".