7773049944361 has 9 divisors (see below), whose sum is σ = 8417010488439. Its totient is φ = 7175089569336.

The previous prime is 7773049944307. The next prime is 7773049944421. The reversal of 7773049944361 is 1634499403777.

The square root of 7773049944361 is 2788019.

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., 1149859459225 + 6623190485136 = 1072315^2 + 2573556^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7773049944361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7773049944293 and 7773049944302.

It is not an unprimeable number, because it can be changed into a prime (7773049954361) 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, 36137016 + ... + 36351478.

Almost surely, 2^{7773049944361} is an apocalyptic number.

7773049944361 is the 2788019-th square number.

7773049944361 is the 1394010-th centered octagonal number.

It is an amenable number.

7773049944361 is a deficient number, since it is larger than the sum of its proper divisors (643960544078).

7773049944361 is an frugal number, since it uses more digits than its factorization.

7773049944361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428952 (or 214476 counting only the distinct ones).

The product of its (nonzero) digits is 96018048, while the sum is 64.

Multiplying 7773049944361 by its sum of digits (64), we get a square (497475196439104 = 22304152²).

The spelling of 7773049944361 in words is "seven trillion, seven hundred seventy-three billion, forty-nine million, nine hundred forty-four thousand, three hundred sixty-one".