1098616780817 has 2 divisors, whose sum is σ = 1098616780818. Its totient is φ = 1098616780816.

The previous prime is 1098616780759. The next prime is 1098616780837. The reversal of 1098616780817 is 7180876168901.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1098322864081 + 293916736 = 1048009^2 + 17144^2 .

It is a cyclic number.

It is not a de Polignac number, because 1098616780817 - 2⁶ = 1098616780753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1098616780817.

It is not a weakly prime, because it can be changed into another prime (1098616780837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549308390408 + 549308390409.

It is an arithmetic number, because the mean of its divisors is an integer number (549308390409).

Almost surely, 2^{1098616780817} is an apocalyptic number.

It is an amenable number.

1098616780817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098616780817 is an equidigital number, since it uses as much as digits as its factorization.

1098616780817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 62.

The spelling of 1098616780817 in words is "one trillion, ninety-eight billion, six hundred sixteen million, seven hundred eighty thousand, eight hundred seventeen".