7764538693 has 2 divisors, whose sum is σ = 7764538694. Its totient is φ = 7764538692.

The previous prime is 7764538517. The next prime is 7764538703. The reversal of 7764538693 is 3968354677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4848754689 + 2915784004 = 69633^2 + 53998^2 .

It is a cyclic number.

It is not a de Polignac number, because 7764538693 - 2²⁹ = 7227667781 is a prime.

It is a super-2 number, since 2×7764538693² (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 (7764532693) 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, 3882269346 + 3882269347.

It is an arithmetic number, because the mean of its divisors is an integer number (3882269347).

Almost surely, 2^7764538693 is an apocalyptic number.

It is an amenable number.

7764538693 is a deficient number, since it is larger than the sum of its proper divisors (1).

7764538693 is an equidigital number, since it uses as much as digits as its factorization.

7764538693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 58.

The square root of 7764538693 is about 88116.6198455206. The cubic root of 7764538693 is about 1980.1825064739.

The spelling of 7764538693 in words is "seven billion, seven hundred sixty-four million, five hundred thirty-eight thousand, six hundred ninety-three".