690205505052 has 48 divisors (see below), whose sum is σ = 1840601468160. Its totient is φ = 197195845632.

The previous prime is 690205505039. The next prime is 690205505053. The reversal of 690205505052 is 250505502096.

It is a self number, because there is not a number n which added to its sum of digits gives 690205505052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690205505053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3406783 + ... + 3603689.

It is an arithmetic number, because the mean of its divisors is an integer number (38345863920).

Almost surely, 2^690205505052 is an apocalyptic number.

It is an amenable number.

690205505052 is an abundant number, since it is smaller than the sum of its proper divisors (1150395963108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690205505052 is a wasteful number, since it uses less digits than its factorization.

690205505052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238650 (or 238648 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 39.

The spelling of 690205505052 in words is "six hundred ninety billion, two hundred five million, five hundred five thousand, fifty-two".