1840654772987 has 2 divisors, whose sum is σ = 1840654772988. Its totient is φ = 1840654772986.

The previous prime is 1840654772951. The next prime is 1840654773049. The reversal of 1840654772987 is 7892774560481.

It is a weak prime.

It is an emirp because it is prime and its reverse (7892774560481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1840654772987 - 2¹⁸ = 1840654510843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1840654772087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920327386493 + 920327386494.

It is an arithmetic number, because the mean of its divisors is an integer number (920327386494).

Almost surely, 2^{1840654772987} is an apocalyptic number.

1840654772987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840654772987 is an equidigital number, since it uses as much as digits as its factorization.

1840654772987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189665280, while the sum is 68.

The spelling of 1840654772987 in words is "one trillion, eight hundred forty billion, six hundred fifty-four million, seven hundred seventy-two thousand, nine hundred eighty-seven".