15887832818993 has 2 divisors, whose sum is σ = 15887832818994. Its totient is φ = 15887832818992.

The previous prime is 15887832818951. The next prime is 15887832819073. The reversal of 15887832818993 is 39981823878851.

It is an a-pointer prime, because the next prime (15887832819073) can be obtained adding 15887832818993 to its sum of digits (80).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11179206235024 + 4708626583969 = 3343532^2 + 2169937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15887832818993 is a prime.

It is not a weakly prime, because it can be changed into another prime (15887832814993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7943916409496 + 7943916409497.

It is an arithmetic number, because the mean of its divisors is an integer number (7943916409497).

Almost surely, 2^{15887832818993} is an apocalyptic number.

It is an amenable number.

15887832818993 is a deficient number, since it is larger than the sum of its proper divisors (1).

15887832818993 is an equidigital number, since it uses as much as digits as its factorization.

15887832818993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1672151040, while the sum is 80.

The spelling of 15887832818993 in words is "fifteen trillion, eight hundred eighty-seven billion, eight hundred thirty-two million, eight hundred eighteen thousand, nine hundred ninety-three".