618169040 has 20 divisors (see below), whose sum is σ = 1437243204. Its totient is φ = 247267584.

The previous prime is 618169031. The next prime is 618169043. The reversal of 618169040 is 40961816.

It can be written as a sum of positive squares in 2 ways, for example, as 352087696 + 266081344 = 18764^2 + 16312^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618169043) 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 in 3 ways as a sum of consecutive naturals, for example, 3863477 + ... + 3863636.

Almost surely, 2^618169040 is an apocalyptic number.

It is an amenable number.

618169040 is an abundant number, since it is smaller than the sum of its proper divisors (819074164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618169040 is a wasteful number, since it uses less digits than its factorization.

618169040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727126 (or 7727120 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 618169040 is about 24863.0054498647. The cubic root of 618169040 is about 851.8616819403.

The spelling of 618169040 in words is "six hundred eighteen million, one hundred sixty-nine thousand, forty".