102055540440989 has 2 divisors, whose sum is σ = 102055540440990. Its totient is φ = 102055540440988.

The previous prime is 102055540440983. The next prime is 102055540441007. The reversal of 102055540440989 is 989044045550201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101797344344089 + 258196096900 = 10089467^2 + 508130^2 .

It is a cyclic number.

It is not a de Polignac number, because 102055540440989 - 2⁴⁴ = 84463354396573 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102055540440983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51027770220494 + 51027770220495.

It is an arithmetic number, because the mean of its divisors is an integer number (51027770220495).

Almost surely, 2^{102055540440989} is an apocalyptic number.

It is an amenable number.

102055540440989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102055540440989 is an equidigital number, since it uses as much as digits as its factorization.

102055540440989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368000, while the sum is 56.

The spelling of 102055540440989 in words is "one hundred two trillion, fifty-five billion, five hundred forty million, four hundred forty thousand, nine hundred eighty-nine".