15478939097 has 2 divisors, whose sum is σ = 15478939098. Its totient is φ = 15478939096.

The previous prime is 15478939081. The next prime is 15478939129. The reversal of 15478939097 is 79093987451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15440796121 + 38142976 = 124261^2 + 6176^2 .

It is a cyclic number.

It is not a de Polignac number, because 15478939097 - 2⁴ = 15478939081 is a prime.

It is not a weakly prime, because it can be changed into another prime (15478939397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7739469548 + 7739469549.

It is an arithmetic number, because the mean of its divisors is an integer number (7739469549).

Almost surely, 2^15478939097 is an apocalyptic number.

It is an amenable number.

15478939097 is a deficient number, since it is larger than the sum of its proper divisors (1).

15478939097 is an equidigital number, since it uses as much as digits as its factorization.

15478939097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 15478939097 in words is "fifteen billion, four hundred seventy-eight million, nine hundred thirty-nine thousand, ninety-seven".