618880725 has 72 divisors (see below), whose sum is σ = 1159247232. Its totient is φ = 315302400.

The previous prime is 618880721. The next prime is 618880727. The reversal of 618880725 is 527088816.

618880725 is a `hidden beast` number, since 618 + 8 + 8 + 0 + 7 + 25 = 666.

It is not a de Polignac number, because 618880725 - 2² = 618880721 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618880721) 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 in 71 ways as a sum of consecutive naturals, for example, 454045 + ... + 455405.

It is an arithmetic number, because the mean of its divisors is an integer number (16100656).

Almost surely, 2^618880725 is an apocalyptic number.

It is an amenable number.

618880725 is a deficient number, since it is larger than the sum of its proper divisors (540366507).

618880725 is a wasteful number, since it uses less digits than its factorization.

618880725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467 (or 1459 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 618880725 is about 24877.3134602593. The cubic root of 618880725 is about 852.1884667049.

The spelling of 618880725 in words is "six hundred eighteen million, eight hundred eighty thousand, seven hundred twenty-five".