1618306656 has 24 divisors (see below), whose sum is σ = 4248055224. Its totient is φ = 539435520.

The previous prime is 1618306649. The next prime is 1618306667. The reversal of 1618306656 is 6566038161.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8428585 + ... + 8428776.

It is an arithmetic number, because the mean of its divisors is an integer number (177002301).

Almost surely, 2^1618306656 is an apocalyptic number.

1618306656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1618306656 is an abundant number, since it is smaller than the sum of its proper divisors (2629748568).

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

1618306656 is a wasteful number, since it uses less digits than its factorization.

1618306656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16857374 (or 16857366 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1618306656 is about 40228.1823601316. The cubic root of 1618306656 is about 1174.0509387237.

The spelling of 1618306656 in words is "one billion, six hundred eighteen million, three hundred six thousand, six hundred fifty-six".