7764531121 has 2 divisors, whose sum is σ = 7764531122. Its totient is φ = 7764531120.

The previous prime is 7764531053. The next prime is 7764531139. The reversal of 7764531121 is 1211354677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4326350625 + 3438180496 = 65775^2 + 58636^2 .

It is a cyclic number.

It is not a de Polignac number, because 7764531121 - 2²¹ = 7762433969 is a prime.

It is not a weakly prime, because it can be changed into another prime (7764531721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3882265560 + 3882265561.

It is an arithmetic number, because the mean of its divisors is an integer number (3882265561).

Almost surely, 2^7764531121 is an apocalyptic number.

It is an amenable number.

7764531121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7764531121 is an equidigital number, since it uses as much as digits as its factorization.

7764531121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 37.

The square root of 7764531121 is about 88116.5768797222. The cubic root of 7764531121 is about 1980.1818627805.

Adding to 7764531121 its reverse (1211354677), we get a palindrome (8975885798).

The spelling of 7764531121 in words is "seven billion, seven hundred sixty-four million, five hundred thirty-one thousand, one hundred twenty-one".