618273306832553 has 2 divisors, whose sum is σ = 618273306832554. Its totient is φ = 618273306832552.

The previous prime is 618273306832537. The next prime is 618273306832613. The reversal of 618273306832553 is 355238603372816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 509122904317504 + 109150402515049 = 22563752^2 + 10447507^2 .

It is a cyclic number.

It is not a de Polignac number, because 618273306832553 - 2⁴ = 618273306832537 is a prime.

It is not a weakly prime, because it can be changed into another prime (618273306832253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309136653416276 + 309136653416277.

It is an arithmetic number, because the mean of its divisors is an integer number (309136653416277).

Almost surely, 2^{618273306832553} is an apocalyptic number.

It is an amenable number.

618273306832553 is a deficient number, since it is larger than the sum of its proper divisors (1).

618273306832553 is an equidigital number, since it uses as much as digits as its factorization.

618273306832553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 130636800, while the sum is 62.

The spelling of 618273306832553 in words is "six hundred eighteen trillion, two hundred seventy-three billion, three hundred six million, eight hundred thirty-two thousand, five hundred fifty-three".