15456515197 has 2 divisors, whose sum is σ = 15456515198. Its totient is φ = 15456515196.

The previous prime is 15456515167. The next prime is 15456515201. The reversal of 15456515197 is 79151565451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9524588836 + 5931926361 = 97594^2 + 77019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15456515197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15456515197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15456515167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7728257598 + 7728257599.

It is an arithmetic number, because the mean of its divisors is an integer number (7728257599).

Almost surely, 2^15456515197 is an apocalyptic number.

It is an amenable number.

15456515197 is a deficient number, since it is larger than the sum of its proper divisors (1).

15456515197 is an equidigital number, since it uses as much as digits as its factorization.

15456515197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945000, while the sum is 49.

The spelling of 15456515197 in words is "fifteen billion, four hundred fifty-six million, five hundred fifteen thousand, one hundred ninety-seven".