618451558441 has 2 divisors, whose sum is σ = 618451558442. Its totient is φ = 618451558440.

The previous prime is 618451558423. The next prime is 618451558451. The reversal of 618451558441 is 144855154816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406156388416 + 212295170025 = 637304^2 + 460755^2 .

It is a cyclic number.

It is not a de Polignac number, because 618451558441 - 2¹⁷ = 618451427369 is a prime.

It is a super-3 number, since 3×618451558441³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (618451558451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309225779220 + 309225779221.

It is an arithmetic number, because the mean of its divisors is an integer number (309225779221).

Almost surely, 2^618451558441 is an apocalyptic number.

It is an amenable number.

618451558441 is a deficient number, since it is larger than the sum of its proper divisors (1).

618451558441 is an equidigital number, since it uses as much as digits as its factorization.

618451558441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072000, while the sum is 52.

The spelling of 618451558441 in words is "six hundred eighteen billion, four hundred fifty-one million, five hundred fifty-eight thousand, four hundred forty-one".