15494694814693 has 2 divisors, whose sum is σ = 15494694814694. Its totient is φ = 15494694814692.

The previous prime is 15494694814667. The next prime is 15494694814757. The reversal of 15494694814693 is 39641849649451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14649587840484 + 845106974209 = 3827478^2 + 919297^2 .

It is a cyclic number.

It is not a de Polignac number, because 15494694814693 - 2¹⁷ = 15494694683621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15494694814493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7747347407346 + 7747347407347.

It is an arithmetic number, because the mean of its divisors is an integer number (7747347407347).

Almost surely, 2^{15494694814693} is an apocalyptic number.

It is an amenable number.

15494694814693 is a deficient number, since it is larger than the sum of its proper divisors (1).

15494694814693 is an equidigital number, since it uses as much as digits as its factorization.

15494694814693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806215680, while the sum is 73.

The spelling of 15494694814693 in words is "fifteen trillion, four hundred ninety-four billion, six hundred ninety-four million, eight hundred fourteen thousand, six hundred ninety-three".