618988139453 has 2 divisors, whose sum is σ = 618988139454. Its totient is φ = 618988139452.

The previous prime is 618988139353. The next prime is 618988139477. The reversal of 618988139453 is 354931889816.

618988139453 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 542782880644 + 76205258809 = 736738^2 + 276053^2 .

It is a cyclic number.

It is not a de Polignac number, because 618988139453 - 2¹² = 618988135357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618988139453.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618988139353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309494069726 + 309494069727.

It is an arithmetic number, because the mean of its divisors is an integer number (309494069727).

Almost surely, 2^618988139453 is an apocalyptic number.

It is an amenable number.

618988139453 is a deficient number, since it is larger than the sum of its proper divisors (1).

618988139453 is an equidigital number, since it uses as much as digits as its factorization.

618988139453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44789760, while the sum is 65.

The spelling of 618988139453 in words is "six hundred eighteen billion, nine hundred eighty-eight million, one hundred thirty-nine thousand, four hundred fifty-three".