1618546372 has 12 divisors (see below), whose sum is σ = 2832770556. Its totient is φ = 809183360.

The previous prime is 1618546361. The next prime is 1618546373. The reversal of 1618546372 is 2736458161.

It can be written as a sum of positive squares in 2 ways, for example, as 1370924676 + 247621696 = 37026^2 + 15736^2 .

It is not an unprimeable number, because it can be changed into a prime (1618546373) by changing a digit.

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, 33672 + ... + 66112.

It is an arithmetic number, because the mean of its divisors is an integer number (236064213).

Almost surely, 2^1618546372 is an apocalyptic number.

It is an amenable number.

1618546372 is a deficient number, since it is larger than the sum of its proper divisors (1214224184).

1618546372 is a wasteful number, since it uses less digits than its factorization.

1618546372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44918 (or 44916 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 1618546372 is about 40231.1617033364. The cubic root of 1618546372 is about 1174.1089056730.

The spelling of 1618546372 in words is "one billion, six hundred eighteen million, five hundred forty-six thousand, three hundred seventy-two".