815882052005 has 6 divisors (see below), whose sum is σ = 979060886118. Its totient is φ = 652704025800.

The previous prime is 815882051981. The next prime is 815882052017. The reversal of 815882052005 is 500250288518.

It can be written as a sum of positive squares in only one way, i.e., 652705641604 + 163176410401 = 807902^2 + 403951^2 .

It is not a de Polignac number, because 815882052005 - 2⁸ = 815882051749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1817780 + ... + 2221730.

It is an arithmetic number, because the mean of its divisors is an integer number (163176814353).

Almost surely, 2^815882052005 is an apocalyptic number.

It is an amenable number.

815882052005 is a deficient number, since it is larger than the sum of its proper divisors (163178834113).

815882052005 is an frugal number, since it uses more digits than its factorization.

815882052005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807907 (or 403956 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 44.

The spelling of 815882052005 in words is "eight hundred fifteen billion, eight hundred eighty-two million, fifty-two thousand, five".