1864758574681 has 2 divisors, whose sum is σ = 1864758574682. Its totient is φ = 1864758574680.

The previous prime is 1864758574663. The next prime is 1864758574729.

It is a happy number.

1864758574681 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1744499432025 + 120259142656 = 1320795^2 + 346784^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1864758574681 - 2⁵ = 1864758574649 is a prime.

It is a super-2 number, since 2×1864758574681² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1864758574681.

It is not a weakly prime, because it can be changed into another prime (1864758574621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932379287340 + 932379287341.

It is an arithmetic number, because the mean of its divisors is an integer number (932379287341).

Almost surely, 2^{1864758574681} is an apocalyptic number.

It is an amenable number.

1864758574681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864758574681 is an equidigital number, since it uses as much as digits as its factorization.

1864758574681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 361267200, while the sum is 70.

The spelling of 1864758574681 in words is "one trillion, eight hundred sixty-four billion, seven hundred fifty-eight million, five hundred seventy-four thousand, six hundred eighty-one".