814545505 has 12 divisors (see below), whose sum is σ = 993763836. Its totient is φ = 640939200.

The previous prime is 814545503. The next prime is 814545509. The reversal of 814545505 is 505545418.

It can be written as a sum of positive squares in 6 ways, for example, as 85599504 + 728946001 = 9252^2 + 26999^2 .

It is not a de Polignac number, because 814545505 - 2¹ = 814545503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (814545503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3286 + ... + 40495.

It is an arithmetic number, because the mean of its divisors is an integer number (82813653).

Almost surely, 2^814545505 is an apocalyptic number.

It is an amenable number.

814545505 is a deficient number, since it is larger than the sum of its proper divisors (179218331).

814545505 is an equidigital number, since it uses as much as digits as its factorization.

814545505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43908 (or 43847 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 37.

The square root of 814545505 is about 28540.2436044264. The cubic root of 814545505 is about 933.9101966031.

The spelling of 814545505 in words is "eight hundred fourteen million, five hundred forty-five thousand, five hundred five".