1598816644 has 12 divisors (see below), whose sum is σ = 2799897100. Its totient is φ = 798846048.

The previous prime is 1598816627. The next prime is 1598816647. The reversal of 1598816644 is 4466188951.

It can be written as a sum of positive squares in 2 ways, for example, as 751308100 + 847508544 = 27410^2 + 29112^2 .

It is a super-2 number, since 2×1598816644² = 5112429322262845472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1598816591 and 1598816600.

It is not an unprimeable number, because it can be changed into a prime (1598816647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134139 + ... + 145570.

Almost surely, 2^1598816644 is an apocalyptic number.

It is an amenable number.

1598816644 is a deficient number, since it is larger than the sum of its proper divisors (1201080456).

1598816644 is a wasteful number, since it uses less digits than its factorization.

1598816644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281142 (or 281140 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 1598816644 is about 39985.2053139658. The cubic root of 1598816644 is about 1169.3186780080.

The spelling of 1598816644 in words is "one billion, five hundred ninety-eight million, eight hundred sixteen thousand, six hundred forty-four".