209716769034 has 160 divisors (see below), whose sum is σ = 504933580800. Its totient is φ = 64863620640.

The previous prime is 209716769029. The next prime is 209716769057. The reversal of 209716769034 is 430967617902.

It is a happy number.

It is a super-2 number, since 2×209716769034² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 30878179 + ... + 30884969.

It is an arithmetic number, because the mean of its divisors is an integer number (3155834880).

Almost surely, 2^209716769034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 209716769034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252466790400).

209716769034 is an abundant number, since it is smaller than the sum of its proper divisors (295216811766).

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

209716769034 is a wasteful number, since it uses less digits than its factorization.

209716769034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7030 (or 7021 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 209716769034 in words is "two hundred nine billion, seven hundred sixteen million, seven hundred sixty-nine thousand, thirty-four".