618725801 has 2 divisors, whose sum is σ = 618725802. Its totient is φ = 618725800.

The previous prime is 618725777. The next prime is 618725819. The reversal of 618725801 is 108527816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518245225 + 100480576 = 22765^2 + 10024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618725801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (618725201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309362900 + 309362901.

It is an arithmetic number, because the mean of its divisors is an integer number (309362901).

Almost surely, 2^618725801 is an apocalyptic number.

It is an amenable number.

618725801 is a deficient number, since it is larger than the sum of its proper divisors (1).

618725801 is an equidigital number, since it uses as much as digits as its factorization.

618725801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 618725801 is about 24874.1995047077. The cubic root of 618725801 is about 852.1173515133.

The spelling of 618725801 in words is "six hundred eighteen million, seven hundred twenty-five thousand, eight hundred one".