7085780819569 has 9 divisors (see below), whose sum is σ = 7111837607329. Its totient is φ = 7059819182080.

The previous prime is 7085780819543. The next prime is 7085780819591. The reversal of 7085780819569 is 9659180875807.

The square root of 7085780819569 is 2661913.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3649532640625 + 3436248178944 = 1910375^2 + 1853712^2 .

It is not a de Polignac number, because 7085780819569 - 2¹³ = 7085780811377 is a prime.

It is a super-2 number, since 2×7085780819569² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7085780819669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 747992817 + ... + 748002289.

Almost surely, 2^{7085780819569} is an apocalyptic number.

7085780819569 is the 2661913-rd square number.

7085780819569 is the 1330957-th centered octagonal number.

It is an amenable number.

7085780819569 is a deficient number, since it is larger than the sum of its proper divisors (26056787760).

7085780819569 is an frugal number, since it uses more digits than its factorization.

7085780819569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19508 (or 9754 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 73.

The spelling of 7085780819569 in words is "seven trillion, eighty-five billion, seven hundred eighty million, eight hundred nineteen thousand, five hundred sixty-nine".