805005849390625 has 49 divisors (see below), whose sum is σ = 1023015172171777. Its totient is φ = 633447225750000.

The previous prime is 805005849390577. The next prime is 805005849390653. The reversal of 805005849390625 is 526093948500508.

The square root of 805005849390625 is 28372625.

The cubic root of 805005849390625 is 93025.

It is a perfect power (a square, a cube, a 6-th power), and thus also a powerful number.

It can be written as a sum of positive squares in 24 ways, for example, as 496824172939809 + 308181676450816 = 22289553^2 + 17555104^2 .

It is not a de Polignac number, because 805005849390625 - 2¹³ = 805005849382433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 48 ways as a sum of consecutive naturals, for example, 13196817203095 + ... + 13196817203155.

Almost surely, 2^{805005849390625} is an apocalyptic number.

805005849390625 is the 28372625-th square number.

805005849390625 is the 14186313-rd centered octagonal number.

It is an amenable number.

805005849390625 is a deficient number, since it is larger than the sum of its proper divisors (218009322781152).

805005849390625 is an frugal number, since it uses more digits than its factorization.

805005849390625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 64.

The spelling of 805005849390625 in words is "eight hundred five trillion, five billion, eight hundred forty-nine million, three hundred ninety thousand, six hundred twenty-five".