1618261008 has 640 divisors, whose sum is σ = 6079610880. Its totient is φ = 358318080.

The previous prime is 1618260967. The next prime is 1618261037. The reversal of 1618261008 is 8001628161.

It is a self number, because there is not a number n which added to its sum of digits gives 1618261008.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 43736766 + ... + 43736802.

It is an arithmetic number, because the mean of its divisors is an integer number (9499392).

Almost surely, 2^1618261008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618261008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3039805440).

1618261008 is an abundant number, since it is smaller than the sum of its proper divisors (4461349872).

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

1618261008 is a wasteful number, since it uses less digits than its factorization.

1618261008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 1618261008 is about 40227.6149926888. The cubic root of 1618261008 is about 1174.0398996991.

Adding to 1618261008 its reverse (8001628161), we get a palindrome (9619889169).

The spelling of 1618261008 in words is "one billion, six hundred eighteen million, two hundred sixty-one thousand, eight".