815234645 has 8 divisors (see below), whose sum is σ = 979980504. Its totient is φ = 651055104.

The previous prime is 815234633. The next prime is 815234663. The reversal of 815234645 is 546432518.

It can be written as a sum of positive squares in 4 ways, for example, as 372258436 + 442976209 = 19294^2 + 21047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815234645 - 2⁸ = 815234389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 815234599 and 815234608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138404 + ... + 144173.

It is an arithmetic number, because the mean of its divisors is an integer number (122497563).

Almost surely, 2^815234645 is an apocalyptic number.

It is an amenable number.

815234645 is a deficient number, since it is larger than the sum of its proper divisors (164745859).

815234645 is a wasteful number, since it uses less digits than its factorization.

815234645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283159.

The product of its digits is 115200, while the sum is 38.

The square root of 815234645 is about 28552.3141794146. The cubic root of 815234645 is about 934.1734982240.

It can be divided in two parts, 81523 and 4645, that added together give a palindrome (86168).

The spelling of 815234645 in words is "eight hundred fifteen million, two hundred thirty-four thousand, six hundred forty-five".