618502781123 has 2 divisors, whose sum is σ = 618502781124. Its totient is φ = 618502781122.

The previous prime is 618502781119. The next prime is 618502781207. The reversal of 618502781123 is 321187205816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618502781123 - 2² = 618502781119 is a prime.

It is a super-2 number, since 2×618502781123² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (618502781423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309251390561 + 309251390562.

It is an arithmetic number, because the mean of its divisors is an integer number (309251390562).

Almost surely, 2^618502781123 is an apocalyptic number.

618502781123 is a deficient number, since it is larger than the sum of its proper divisors (1).

618502781123 is an equidigital number, since it uses as much as digits as its factorization.

618502781123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

Adding to 618502781123 its reverse (321187205816), we get a palindrome (939689986939).

The spelling of 618502781123 in words is "six hundred eighteen billion, five hundred two million, seven hundred eighty-one thousand, one hundred twenty-three".