1861316513 has 32 divisors (see below), whose sum is σ = 2305290240. Its totient is φ = 1467348480.

The previous prime is 1861316507. The next prime is 1861316521. The reversal of 1861316513 is 3156131681.

It is a cyclic number.

It is not a de Polignac number, because 1861316513 - 2⁴ = 1861316497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1861316503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 817745 + ... + 820017.

It is an arithmetic number, because the mean of its divisors is an integer number (72040320).

Almost surely, 2^1861316513 is an apocalyptic number.

It is an amenable number.

1861316513 is a deficient number, since it is larger than the sum of its proper divisors (443973727).

1861316513 is a wasteful number, since it uses less digits than its factorization.

1861316513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2477.

The product of its digits is 12960, while the sum is 35.

The square root of 1861316513 is about 43142.9775629824. The cubic root of 1861316513 is about 1230.0990320598.

The spelling of 1861316513 in words is "one billion, eight hundred sixty-one million, three hundred sixteen thousand, five hundred thirteen".