1661502312 has 24 divisors (see below), whose sum is σ = 4499902290. Its totient is φ = 553834080.

The previous prime is 1661502287. The next prime is 1661502341. The reversal of 1661502312 is 2132051661.

1661502312 is a `hidden beast` number, since 16 + 615 + 0 + 2 + 31 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1526152356 + 135349956 = 39066^2 + 11634^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11538139 + ... + 11538282.

Almost surely, 2^1661502312 is an apocalyptic number.

1661502312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1661502312 is an abundant number, since it is smaller than the sum of its proper divisors (2838399978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1661502312 is a wasteful number, since it uses less digits than its factorization.

1661502312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23076433 (or 23076426 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1661502312 is about 40761.5298044615. The cubic root of 1661502312 is about 1184.4052305546.

Adding to 1661502312 its reverse (2132051661), we get a palindrome (3793553973).

The spelling of 1661502312 in words is "one billion, six hundred sixty-one million, five hundred two thousand, three hundred twelve".