1861282776013 has 2 divisors, whose sum is σ = 1861282776014. Its totient is φ = 1861282776012.

The previous prime is 1861282776007. The next prime is 1861282776053. The reversal of 1861282776013 is 3106772821681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1452345547689 + 408937228324 = 1205133^2 + 639482^2 .

It is a cyclic number.

It is not a de Polignac number, because 1861282776013 - 2⁹ = 1861282775501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1861282776053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 930641388006 + 930641388007.

It is an arithmetic number, because the mean of its divisors is an integer number (930641388007).

Almost surely, 2^{1861282776013} is an apocalyptic number.

It is an amenable number.

1861282776013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1861282776013 is an equidigital number, since it uses as much as digits as its factorization.

1861282776013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 1861282776013 in words is "one trillion, eight hundred sixty-one billion, two hundred eighty-two million, seven hundred seventy-six thousand, thirteen".