1861124772233 has 2 divisors, whose sum is σ = 1861124772234. Its totient is φ = 1861124772232.

The previous prime is 1861124772229. The next prime is 1861124772263. The reversal of 1861124772233 is 3322774211681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1842176423824 + 18948348409 = 1357268^2 + 137653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1861124772233 - 2² = 1861124772229 is a prime.

It is a super-2 number, since 2×1861124772233² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1861124772263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930562386116 + 930562386117.

It is an arithmetic number, because the mean of its divisors is an integer number (930562386117).

Almost surely, 2^{1861124772233} is an apocalyptic number.

It is an amenable number.

1861124772233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861124772233 is an equidigital number, since it uses as much as digits as its factorization.

1861124772233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 47.

The spelling of 1861124772233 in words is "one trillion, eight hundred sixty-one billion, one hundred twenty-four million, seven hundred seventy-two thousand, two hundred thirty-three".