15085642993 has 2 divisors, whose sum is σ = 15085642994. Its totient is φ = 15085642992.

The previous prime is 15085642981. The next prime is 15085643113. The reversal of 15085642993 is 39924658051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15085489329 + 153664 = 122823^2 + 392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15085642993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15085642993.

It is not a weakly prime, because it can be changed into another prime (15085642973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7542821496 + 7542821497.

It is an arithmetic number, because the mean of its divisors is an integer number (7542821497).

Almost surely, 2^15085642993 is an apocalyptic number.

It is an amenable number.

15085642993 is a deficient number, since it is larger than the sum of its proper divisors (1).

15085642993 is an equidigital number, since it uses as much as digits as its factorization.

15085642993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2332800, while the sum is 52.

The spelling of 15085642993 in words is "fifteen billion, eighty-five million, six hundred forty-two thousand, nine hundred ninety-three".