8502972928649 has 2 divisors, whose sum is σ = 8502972928650. Its totient is φ = 8502972928648.

The previous prime is 8502972928589. The next prime is 8502972928693. The reversal of 8502972928649 is 9468292792058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7553455206025 + 949517722624 = 2748355^2 + 974432^2 .

It is a cyclic number.

It is not a de Polignac number, because 8502972928649 - 2²⁴ = 8502956151433 is a prime.

It is not a weakly prime, because it can be changed into another prime (8502972928699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4251486464324 + 4251486464325.

It is an arithmetic number, because the mean of its divisors is an integer number (4251486464325).

Almost surely, 2^{8502972928649} is an apocalyptic number.

It is an amenable number.

8502972928649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8502972928649 is an equidigital number, since it uses as much as digits as its factorization.

8502972928649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 8502972928649 in words is "eight trillion, five hundred two billion, nine hundred seventy-two million, nine hundred twenty-eight thousand, six hundred forty-nine".