1618664755 has 8 divisors (see below), whose sum is σ = 1965800592. Its totient is φ = 1279329888.

The previous prime is 1618664743. The next prime is 1618664791. The reversal of 1618664755 is 5574668161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1618664755 - 2¹¹ = 1618662707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1618664699 and 1618664708.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1949784 + ... + 1950613.

It is an arithmetic number, because the mean of its divisors is an integer number (245725074).

Almost surely, 2^1618664755 is an apocalyptic number.

1618664755 is a deficient number, since it is larger than the sum of its proper divisors (347135837).

1618664755 is an equidigital number, since it uses as much as digits as its factorization.

1618664755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900485.

The product of its digits is 1209600, while the sum is 49.

The square root of 1618664755 is about 40232.6329613164. The cubic root of 1618664755 is about 1174.1375303592.

The spelling of 1618664755 in words is "one billion, six hundred eighteen million, six hundred sixty-four thousand, seven hundred fifty-five".