7764538651 has 16 divisors (see below), whose sum is σ = 8535018240. Its totient is φ = 7030726560.

The previous prime is 7764538517. The next prime is 7764538693. The reversal of 7764538651 is 1568354677.

It is a happy number.

It is not a de Polignac number, because 7764538651 - 2¹¹ = 7764536603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7764538351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 642081 + ... + 654061.

It is an arithmetic number, because the mean of its divisors is an integer number (533438640).

Almost surely, 2^7764538651 is an apocalyptic number.

7764538651 is a deficient number, since it is larger than the sum of its proper divisors (770479589).

7764538651 is a wasteful number, since it uses less digits than its factorization.

7764538651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13506.

The product of its digits is 4233600, while the sum is 52.

The square root of 7764538651 is about 88116.6196072001. The cubic root of 7764538651 is about 1980.1825029035.

The spelling of 7764538651 in words is "seven billion, seven hundred sixty-four million, five hundred thirty-eight thousand, six hundred fifty-one".