15477770940197 has 2 divisors, whose sum is σ = 15477770940198. Its totient is φ = 15477770940196.

The previous prime is 15477770940167. The next prime is 15477770940239. The reversal of 15477770940197 is 79104907777451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13681350766561 + 1796420173636 = 3698831^2 + 1340306^2 .

It is an emirp because it is prime and its reverse (79104907777451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15477770940197 - 2²⁸ = 15477502504741 is a prime.

It is a super-2 number, since 2×15477770940197² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15477770940167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7738885470098 + 7738885470099.

It is an arithmetic number, because the mean of its divisors is an integer number (7738885470099).

Almost surely, 2^{15477770940197} is an apocalyptic number.

It is an amenable number.

15477770940197 is a deficient number, since it is larger than the sum of its proper divisors (1).

15477770940197 is an equidigital number, since it uses as much as digits as its factorization.

15477770940197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108909360, while the sum is 68.

The spelling of 15477770940197 in words is "fifteen trillion, four hundred seventy-seven billion, seven hundred seventy million, nine hundred forty thousand, one hundred ninety-seven".