7790255956609 has 9 divisors (see below), whose sum is σ = 9062157207747. Its totient is φ = 6677345501904.

The previous prime is 7790255956607. The next prime is 7790255956661. The reversal of 7790255956609 is 9066595520977.

The square root of 7790255956609 is 2791103.

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

It can be written as a sum of positive squares in only one way, i.e., 351675009 + 7789904281600 = 18753^2 + 2791040^2 .

It is not a de Polignac number, because 7790255956609 - 2¹ = 7790255956607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7790255956601) 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, 19338357 + ... + 19737085.

Almost surely, 2^{7790255956609} is an apocalyptic number.

7790255956609 is the 2791103-rd square number.

7790255956609 is the 1395552-nd centered octagonal number.

It is an amenable number.

7790255956609 is a deficient number, since it is larger than the sum of its proper divisors (1271901251138).

7790255956609 is an frugal number, since it uses more digits than its factorization.

7790255956609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797472 (or 398736 counting only the distinct ones).

The product of its (nonzero) digits is 321489000, while the sum is 70.

The spelling of 7790255956609 in words is "seven trillion, seven hundred ninety billion, two hundred fifty-five million, nine hundred fifty-six thousand, six hundred nine".