999997995802 has 16 divisors (see below), whose sum is σ = 1625670437832. Its totient is φ = 458597805120.

The previous prime is 999997995743. The next prime is 999997995803. The reversal of 999997995802 is 208599799999.

It is a happy number.

999997995802 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 257179822641 + 742818173161 = 507129^2 + 861869^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 999997995802.

It is not an unprimeable number, because it can be changed into a prime (999997995803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122484649 + ... + 122492812.

Almost surely, 2^999997995802 is an apocalyptic number.

999997995802 is a deficient number, since it is larger than the sum of its proper divisors (625672442030).

999997995802 is a wasteful number, since it uses less digits than its factorization.

999997995802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244977633.

The product of its (nonzero) digits is 2678462640, while the sum is 85.

The spelling of 999997995802 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-five thousand, eight hundred two".