986154651217 has 2 divisors, whose sum is σ = 986154651218. Its totient is φ = 986154651216.

The previous prime is 986154651211. The next prime is 986154651263. The reversal of 986154651217 is 712156451689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 930532258881 + 55622392336 = 964641^2 + 235844^2 .

It is a cyclic number.

It is not a de Polignac number, because 986154651217 - 2¹⁹ = 986154126929 is a prime.

It is a super-2 number, since 2×986154651217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (986154651211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493077325608 + 493077325609.

It is an arithmetic number, because the mean of its divisors is an integer number (493077325609).

Almost surely, 2^986154651217 is an apocalyptic number.

It is an amenable number.

986154651217 is a deficient number, since it is larger than the sum of its proper divisors (1).

986154651217 is an equidigital number, since it uses as much as digits as its factorization.

986154651217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 55.

The spelling of 986154651217 in words is "nine hundred eighty-six billion, one hundred fifty-four million, six hundred fifty-one thousand, two hundred seventeen".