9528780647 has 4 divisors (see below), whose sum is σ = 9857359320. Its totient is φ = 9200201976.

The previous prime is 9528780643. The next prime is 9528780707. The reversal of 9528780647 is 7460878259.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7460878259 = 10433 ⋅715123.

It is not a de Polignac number, because 9528780647 - 2² = 9528780643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9528780592 and 9528780601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9528780643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164289293 + ... + 164289350.

It is an arithmetic number, because the mean of its divisors is an integer number (2464339830).

Almost surely, 2^9528780647 is an apocalyptic number.

9528780647 is a deficient number, since it is larger than the sum of its proper divisors (328578673).

9528780647 is a wasteful number, since it uses less digits than its factorization.

9528780647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328578672.

The product of its (nonzero) digits is 6773760, while the sum is 56.

The square root of 9528780647 is about 97615.4733994565. The cubic root of 9528780647 is about 2120.0484033537.

The spelling of 9528780647 in words is "nine billion, five hundred twenty-eight million, seven hundred eighty thousand, six hundred forty-seven".