618622425 has 72 divisors (see below), whose sum is σ = 1198167360. Its totient is φ = 304041600.

The previous prime is 618622423. The next prime is 618622427. The reversal of 618622425 is 524226816.

It is a happy number.

618622425 is a `hidden beast` number, since 6 + 1 + 8 + 622 + 4 + 25 = 666.

It is an interprime number because it is at equal distance from previous prime (618622423) and next prime (618622427).

It is not a de Polignac number, because 618622425 - 2¹ = 618622423 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 618622425.

It is not an unprimeable number, because it can be changed into a prime (618622423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 156220 + ... + 160130.

Almost surely, 2^618622425 is an apocalyptic number.

It is an amenable number.

618622425 is a deficient number, since it is larger than the sum of its proper divisors (579544935).

618622425 is a wasteful number, since it uses less digits than its factorization.

618622425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983 (or 3975 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 618622425 is about 24872.1214414854. The cubic root of 618622425 is about 852.0698919388.

The spelling of 618622425 in words is "six hundred eighteen million, six hundred twenty-two thousand, four hundred twenty-five".