405505501109 has 2 divisors, whose sum is σ = 405505501110. Its totient is φ = 405505501108.

The previous prime is 405505501091. The next prime is 405505501147. The reversal of 405505501109 is 901105505504.

Together with previous prime (405505501091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228003385009 + 177502116100 = 477497^2 + 421310^2 .

It is a cyclic number.

It is not a de Polignac number, because 405505501109 - 2¹² = 405505497013 is a prime.

It is a super-2 number, since 2×405505501109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405505509109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202752750554 + 202752750555.

It is an arithmetic number, because the mean of its divisors is an integer number (202752750555).

Almost surely, 2^405505501109 is an apocalyptic number.

It is an amenable number.

405505501109 is a deficient number, since it is larger than the sum of its proper divisors (1).

405505501109 is an equidigital number, since it uses as much as digits as its factorization.

405505501109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 405505501109 in words is "four hundred five billion, five hundred five million, five hundred one thousand, one hundred nine".