1863913863899 has 16 divisors (see below), whose sum is σ = 1957479229440. Its totient is φ = 1771427064000.

The previous prime is 1863913863893. The next prime is 1863913863907. The reversal of 1863913863899 is 9983683193681.

It is a happy number.

It is not a de Polignac number, because 1863913863899 - 2¹² = 1863913859803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1863913863893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966454 + ... + 2755860.

It is an arithmetic number, because the mean of its divisors is an integer number (122342451840).

Almost surely, 2^{1863913863899} is an apocalyptic number.

1863913863899 is a deficient number, since it is larger than the sum of its proper divisors (93565365541).

1863913863899 is a wasteful number, since it uses less digits than its factorization.

1863913863899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790090.

The product of its digits is 362797056, while the sum is 74.

The spelling of 1863913863899 in words is "one trillion, eight hundred sixty-three billion, nine hundred thirteen million, eight hundred sixty-three thousand, eight hundred ninety-nine".