15155469997 has 2 divisors, whose sum is σ = 15155469998. Its totient is φ = 15155469996.

The previous prime is 15155469983. The next prime is 15155470021. The reversal of 15155469997 is 79996455151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9789321481 + 5366148516 = 98941^2 + 73254^2 .

It is a cyclic number.

It is not a de Polignac number, because 15155469997 - 2⁷ = 15155469869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15155469907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577734998 + 7577734999.

It is an arithmetic number, because the mean of its divisors is an integer number (7577734999).

Almost surely, 2^15155469997 is an apocalyptic number.

It is an amenable number.

15155469997 is a deficient number, since it is larger than the sum of its proper divisors (1).

15155469997 is an equidigital number, since it uses as much as digits as its factorization.

15155469997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15309000, while the sum is 61.

The spelling of 15155469997 in words is "fifteen billion, one hundred fifty-five million, four hundred sixty-nine thousand, nine hundred ninety-seven".