1111623643987 has 2 divisors, whose sum is σ = 1111623643988. Its totient is φ = 1111623643986.

The previous prime is 1111623643979. The next prime is 1111623644107. The reversal of 1111623643987 is 7893463261111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111623643987 - 2³ = 1111623643979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111623643187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555811821993 + 555811821994.

It is an arithmetic number, because the mean of its divisors is an integer number (555811821994).

Almost surely, 2^{1111623643987} is an apocalyptic number.

1111623643987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111623643987 is an equidigital number, since it uses as much as digits as its factorization.

1111623643987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The spelling of 1111623643987 in words is "one trillion, one hundred eleven billion, six hundred twenty-three million, six hundred forty-three thousand, nine hundred eighty-seven".