1864494554 has 16 divisors (see below), whose sum is σ = 3012603720. Its totient is φ = 860328000.

The previous prime is 1864494551. The next prime is 1864494587. The reversal of 1864494554 is 4554944681.

It can be written as a sum of positive squares in 4 ways, for example, as 1140615529 + 723879025 = 33773^2 + 26905^2 .

It is not an unprimeable number, because it can be changed into a prime (1864494551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172304 + ... + 182804.

Almost surely, 2^1864494554 is an apocalyptic number.

1864494554 is a deficient number, since it is larger than the sum of its proper divisors (1148109166).

1864494554 is a wasteful number, since it uses less digits than its factorization.

1864494554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17345.

The product of its digits is 2764800, while the sum is 50.

The square root of 1864494554 is about 43179.7933529099. The cubic root of 1864494554 is about 1230.7987307771.

The spelling of 1864494554 in words is "one billion, eight hundred sixty-four million, four hundred ninety-four thousand, five hundred fifty-four".