699807280805 has 64 divisors (see below), whose sum is σ = 935799480000. Its totient is φ = 499926712320.

The previous prime is 699807280673. The next prime is 699807280871. The reversal of 699807280805 is 508082708996.

It can be written as a sum of positive squares in 32 ways, for example, as 640348847524 + 59458433281 = 800218^2 + 243841^2 .

It is not a de Polignac number, because 699807280805 - 2¹⁴ = 699807264421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 254566571 + ... + 254569319.

It is an arithmetic number, because the mean of its divisors is an integer number (14621866875).

Almost surely, 2^699807280805 is an apocalyptic number.

It is an amenable number.

699807280805 is a deficient number, since it is larger than the sum of its proper divisors (235992199195).

699807280805 is a wasteful number, since it uses less digits than its factorization.

699807280805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554.

The product of its (nonzero) digits is 17418240, while the sum is 62.

The spelling of 699807280805 in words is "six hundred ninety-nine billion, eight hundred seven million, two hundred eighty thousand, eight hundred five".