100516621489 has 2 divisors, whose sum is σ = 100516621490. Its totient is φ = 100516621488.

The previous prime is 100516621477. The next prime is 100516621603. The reversal of 100516621489 is 984126615001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86455405089 + 14061216400 = 294033^2 + 118580^2 .

It is a cyclic number.

It is not a de Polignac number, because 100516621489 - 2²⁷ = 100382403761 is a prime.

It is not a weakly prime, because it can be changed into another prime (100516621789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50258310744 + 50258310745.

It is an arithmetic number, because the mean of its divisors is an integer number (50258310745).

Almost surely, 2^100516621489 is an apocalyptic number.

It is an amenable number.

100516621489 is a deficient number, since it is larger than the sum of its proper divisors (1).

100516621489 is an equidigital number, since it uses as much as digits as its factorization.

100516621489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 100516621489 in words is "one hundred billion, five hundred sixteen million, six hundred twenty-one thousand, four hundred eighty-nine".