9649655257 has 24 divisors (see below), whose sum is σ = 11040361920. Its totient is φ = 8417455200.

The previous prime is 9649655207. The next prime is 9649655291. The reversal of 9649655257 is 7525569469.

It is a de Polignac number, because none of the positive numbers 2^k-9649655257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9649655207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 563532 + ... + 580402.

It is an arithmetic number, because the mean of its divisors is an integer number (460015080).

Almost surely, 2^9649655257 is an apocalyptic number.

It is an amenable number.

9649655257 is a deficient number, since it is larger than the sum of its proper divisors (1390706663).

9649655257 is a wasteful number, since it uses less digits than its factorization.

9649655257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17085 (or 17074 counting only the distinct ones).

The product of its digits is 20412000, while the sum is 58.

The square root of 9649655257 is about 98232.6588106013. The cubic root of 9649655257 is about 2128.9751847445.

The spelling of 9649655257 in words is "nine billion, six hundred forty-nine million, six hundred fifty-five thousand, two hundred fifty-seven".