9646540268551 has 2 divisors, whose sum is σ = 9646540268552. Its totient is φ = 9646540268550.

The previous prime is 9646540268537. The next prime is 9646540268611. The reversal of 9646540268551 is 1558620456469.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9646540268551 - 2³¹ = 9644392784903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9646540268551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9646540268501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4823270134275 + 4823270134276.

It is an arithmetic number, because the mean of its divisors is an integer number (4823270134276).

Almost surely, 2^{9646540268551} is an apocalyptic number.

9646540268551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9646540268551 is an equidigital number, since it uses as much as digits as its factorization.

9646540268551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208000, while the sum is 61.

The spelling of 9646540268551 in words is "nine trillion, six hundred forty-six billion, five hundred forty million, two hundred sixty-eight thousand, five hundred fifty-one".