1618291984 has 45 divisors (see below), whose sum is σ = 3199377103. Its totient is φ = 792974336.

The previous prime is 1618291979. The next prime is 1618291991. The reversal of 1618291984 is 4891928161.

The square root of 1618291984 is 40228.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1122250000 + 496041984 = 33500^2 + 22272^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 14321112 + ... + 14321224.

Almost surely, 2^1618291984 is an apocalyptic number.

1618291984 is the 40228-th square number.

It is an amenable number.

1618291984 is a deficient number, since it is larger than the sum of its proper divisors (1581085119).

1618291984 is an frugal number, since it uses more digits than its factorization.

1618291984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 204 counting only the distinct ones).

The product of its digits is 248832, while the sum is 49.

The cubic root of 1618291984 is about 1174.0473906266.

Multiplying 1618291984 by its sum of digits (49), we get a square (79296307216 = 281596²).

The spelling of 1618291984 in words is "one billion, six hundred eighteen million, two hundred ninety-one thousand, nine hundred eighty-four".