618161407 has 2 divisors, whose sum is σ = 618161408. Its totient is φ = 618161406.

The previous prime is 618161393. The next prime is 618161431. The reversal of 618161407 is 704161816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618161407 - 2⁷ = 618161279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618161707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309080703 + 309080704.

It is an arithmetic number, because the mean of its divisors is an integer number (309080704).

Almost surely, 2^618161407 is an apocalyptic number.

618161407 is a deficient number, since it is larger than the sum of its proper divisors (1).

618161407 is an equidigital number, since it uses as much as digits as its factorization.

618161407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 618161407 is about 24862.8519482380. The cubic root of 618161407 is about 851.8581757327.

The spelling of 618161407 in words is "six hundred eighteen million, one hundred sixty-one thousand, four hundred seven".