8601640726501 has 2 divisors, whose sum is σ = 8601640726502. Its totient is φ = 8601640726500.

The previous prime is 8601640726451. The next prime is 8601640726529. The reversal of 8601640726501 is 1056270461068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8570285525025 + 31355201476 = 2927505^2 + 177074^2 .

It is a cyclic number.

It is not a de Polignac number, because 8601640726501 - 2²¹ = 8601638629349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8601640726801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4300820363250 + 4300820363251.

It is an arithmetic number, because the mean of its divisors is an integer number (4300820363251).

Almost surely, 2^{8601640726501} is an apocalyptic number.

It is an amenable number.

8601640726501 is a deficient number, since it is larger than the sum of its proper divisors (1).

8601640726501 is an equidigital number, since it uses as much as digits as its factorization.

8601640726501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 8601640726501 in words is "eight trillion, six hundred one billion, six hundred forty million, seven hundred twenty-six thousand, five hundred one".