1865736807061 has 4 divisors (see below), whose sum is σ = 1868150438892. Its totient is φ = 1863323175232.

The previous prime is 1865736807029. The next prime is 1865736807119. The reversal of 1865736807061 is 1607086375681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1030854396100 + 834882410961 = 1015310^2 + 913719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1865736807061 - 2⁵ = 1865736807029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1865736806987 and 1865736807005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865736807161) 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 3 ways as a sum of consecutive naturals, for example, 1206814756 + ... + 1206816301.

It is an arithmetic number, because the mean of its divisors is an integer number (467037609723).

Almost surely, 2^{1865736807061} is an apocalyptic number.

It is an amenable number.

1865736807061 is a deficient number, since it is larger than the sum of its proper divisors (2413631831).

1865736807061 is an equidigital number, since it uses as much as digits as its factorization.

1865736807061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2413631830.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 1865736807061 in words is "one trillion, eight hundred sixty-five billion, seven hundred thirty-six million, eight hundred seven thousand, sixty-one".