618561383 has 32 divisors (see below), whose sum is σ = 720728064. Its totient is φ = 525600000.

The previous prime is 618561367. The next prime is 618561403. The reversal of 618561383 is 383165816.

It is a cyclic number.

It is not a de Polignac number, because 618561383 - 2⁴ = 618561367 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618561383.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618561323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2110985 + ... + 2111277.

It is an arithmetic number, because the mean of its divisors is an integer number (22522752).

Almost surely, 2^618561383 is an apocalyptic number.

618561383 is a deficient number, since it is larger than the sum of its proper divisors (102166681).

618561383 is a wasteful number, since it uses less digits than its factorization.

618561383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527.

The product of its digits is 103680, while the sum is 41.

The square root of 618561383 is about 24870.8942943353. The cubic root of 618561383 is about 852.0418652788.

The spelling of 618561383 in words is "six hundred eighteen million, five hundred sixty-one thousand, three hundred eighty-three".