7657563321 has 12 divisors (see below), whose sum is σ = 11096957872. Its totient is φ = 5088411576.

The previous prime is 7657563269. The next prime is 7657563323. The reversal of 7657563321 is 1233657567.

7657563321 is a `hidden beast` number, since 7 + 6 + 5 + 7 + 5 + 633 + 2 + 1 = 666.

It is not a de Polignac number, because 7657563321 - 2²³ = 7649174713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7657563323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1382971 + ... + 1388496.

Almost surely, 2^7657563321 is an apocalyptic number.

It is an amenable number.

7657563321 is a deficient number, since it is larger than the sum of its proper divisors (3439394551).

7657563321 is a wasteful number, since it uses less digits than its factorization.

7657563321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771780 (or 2771777 counting only the distinct ones).

The product of its digits is 793800, while the sum is 45.

The square root of 7657563321 is about 87507.5043696254. The cubic root of 7657563321 is about 1971.0464795707.

The spelling of 7657563321 in words is "seven billion, six hundred fifty-seven million, five hundred sixty-three thousand, three hundred twenty-one".