1861876624036 has 135 divisors (see below), whose sum is σ = 3890461531047. Its totient is φ = 779078345760.

The previous prime is 1861876623983. The next prime is 1861876624037. The reversal of 1861876624036 is 6304266781681.

The square root of 1861876624036 is 1364506.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 923148169636 + 938728454400 = 960806^2 + 968880^2 .

It is not an unprimeable number, because it can be changed into a prime (1861876624037) 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 44 ways as a sum of consecutive naturals, for example, 5073233125 + ... + 5073233491.

Almost surely, 2^{1861876624036} is an apocalyptic number.

1861876624036 is the 1364506-th square number.

It is an amenable number.

1861876624036 is an abundant number, since it is smaller than the sum of its proper divisors (2028584907011).

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

1861876624036 is an frugal number, since it uses more digits than its factorization.

1861876624036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 1861876624036 in words is "one trillion, eight hundred sixty-one billion, eight hundred seventy-six million, six hundred twenty-four thousand, thirty-six".