1601361616 has 10 divisors (see below), whose sum is σ = 3102638162. Its totient is φ = 800680800.

The previous prime is 1601361613. The next prime is 1601361617. The reversal of 1601361616 is 6161631061.

It can be written as a sum of positive squares in only one way, i.e., 1583721616 + 17640000 = 39796^2 + 4200^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601361611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50042535 + ... + 50042566.

Almost surely, 2^1601361616 is an apocalyptic number.

1601361616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1601361616 is a deficient number, since it is larger than the sum of its proper divisors (1501276546).

1601361616 is a wasteful number, since it uses less digits than its factorization.

1601361616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100085109 (or 100085103 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1601361616 is about 40017.0165804499. The cubic root of 1601361616 is about 1169.9387836576.

Adding to 1601361616 its reverse (6161631061), we get a palindrome (7762992677).

The spelling of 1601361616 in words is "one billion, six hundred one million, three hundred sixty-one thousand, six hundred sixteen".