1861603316 has 12 divisors (see below), whose sum is σ = 3290062020. Its totient is φ = 921585600.

The previous prime is 1861603313. The next prime is 1861603327. The reversal of 1861603316 is 6133061681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 952339600 + 909263716 = 30860^2 + 30154^2 .

It is a super-2 number, since 2×1861603316² = 6931133812284391712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1861603313) 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, 2303561 + ... + 2304368.

It is an arithmetic number, because the mean of its divisors is an integer number (274171835).

Almost surely, 2^1861603316 is an apocalyptic number.

It is an amenable number.

1861603316 is a deficient number, since it is larger than the sum of its proper divisors (1428458704).

1861603316 is a wasteful number, since it uses less digits than its factorization.

1861603316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4608034 (or 4608032 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1861603316 is about 43146.3013015021. The cubic root of 1861603316 is about 1230.1622092020.

Adding to 1861603316 its reverse (6133061681), we get a palindrome (7994664997).

The spelling of 1861603316 in words is "one billion, eight hundred sixty-one million, six hundred three thousand, three hundred sixteen".