7764334381 has 2 divisors, whose sum is σ = 7764334382. Its totient is φ = 7764334380.

The previous prime is 7764334349. The next prime is 7764334399. The reversal of 7764334381 is 1834334677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6639805225 + 1124529156 = 81485^2 + 33534^2 .

It is a cyclic number.

It is not a de Polignac number, because 7764334381 - 2⁵ = 7764334349 is a prime.

It is a super-2 number, since 2×7764334381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7764334321) 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 as a sum of consecutive naturals, namely, 3882167190 + 3882167191.

It is an arithmetic number, because the mean of its divisors is an integer number (3882167191).

Almost surely, 2^7764334381 is an apocalyptic number.

It is an amenable number.

7764334381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7764334381 is an equidigital number, since it uses as much as digits as its factorization.

7764334381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 46.

The square root of 7764334381 is about 88115.4605106278. The cubic root of 7764334381 is about 1980.1651378268.

The spelling of 7764334381 in words is "seven billion, seven hundred sixty-four million, three hundred thirty-four thousand, three hundred eighty-one".