13155125491 has 2 divisors, whose sum is σ = 13155125492. Its totient is φ = 13155125490.

The previous prime is 13155125461. The next prime is 13155125567. The reversal of 13155125491 is 19452155131.

It is a weak prime.

It is an emirp because it is prime and its reverse (19452155131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13155125491 - 2¹⁹ = 13154601203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13155125491.

It is not a weakly prime, because it can be changed into another prime (13155125461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6577562745 + 6577562746.

It is an arithmetic number, because the mean of its divisors is an integer number (6577562746).

Almost surely, 2^13155125491 is an apocalyptic number.

13155125491 is a deficient number, since it is larger than the sum of its proper divisors (1).

13155125491 is an equidigital number, since it uses as much as digits as its factorization.

13155125491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 37.

The spelling of 13155125491 in words is "thirteen billion, one hundred fifty-five million, one hundred twenty-five thousand, four hundred ninety-one".