7764533121 has 4 divisors (see below), whose sum is σ = 10352710832. Its totient is φ = 5176355412.

The previous prime is 7764533071. The next prime is 7764533123. The reversal of 7764533121 is 1213354677.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7764533121 - 2¹⁷ = 7764402049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7764533121.

It is not an unprimeable number, because it can be changed into a prime (7764533123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294088851 + ... + 1294088856.

It is an arithmetic number, because the mean of its divisors is an integer number (2588177708).

Almost surely, 2^7764533121 is an apocalyptic number.

It is an amenable number.

7764533121 is a deficient number, since it is larger than the sum of its proper divisors (2588177711).

7764533121 is a wasteful number, since it uses less digits than its factorization.

7764533121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588177710.

The product of its digits is 105840, while the sum is 39.

The square root of 7764533121 is about 88116.5882283240. The cubic root of 7764533121 is about 1980.1820327999.

Adding to 7764533121 its reverse (1213354677), we get a palindrome (8977887798).

The spelling of 7764533121 in words is "seven billion, seven hundred sixty-four million, five hundred thirty-three thousand, one hundred twenty-one".