9649669457 has 2 divisors, whose sum is σ = 9649669458. Its totient is φ = 9649669456.

The previous prime is 9649669453. The next prime is 9649669501. The reversal of 9649669457 is 7549669469.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5756408641 + 3893260816 = 75871^2 + 62396^2 .

It is a cyclic number.

It is not a de Polignac number, because 9649669457 - 2² = 9649669453 is a prime.

It is a super-2 number, since 2×9649669457² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9649669393 and 9649669402.

It is not a weakly prime, because it can be changed into another prime (9649669453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4824834728 + 4824834729.

It is an arithmetic number, because the mean of its divisors is an integer number (4824834729).

Almost surely, 2^9649669457 is an apocalyptic number.

It is an amenable number.

9649669457 is a deficient number, since it is larger than the sum of its proper divisors (1).

9649669457 is an equidigital number, since it uses as much as digits as its factorization.

9649669457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88179840, while the sum is 65.

The square root of 9649669457 is about 98232.7310879627. The cubic root of 9649669457 is about 2128.9762290455.

The spelling of 9649669457 in words is "nine billion, six hundred forty-nine million, six hundred sixty-nine thousand, four hundred fifty-seven".