15880426013449 has 2 divisors, whose sum is σ = 15880426013450. Its totient is φ = 15880426013448.

The previous prime is 15880426013411. The next prime is 15880426013483. The reversal of 15880426013449 is 94431062408851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15858968158224 + 21457855225 = 3982332^2 + 146485^2 .

It is a cyclic number.

It is not a de Polignac number, because 15880426013449 - 2¹⁵ = 15880425980681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15880426013449.

It is not a weakly prime, because it can be changed into another prime (15880426013549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7940213006724 + 7940213006725.

It is an arithmetic number, because the mean of its divisors is an integer number (7940213006725).

Almost surely, 2^{15880426013449} is an apocalyptic number.

It is an amenable number.

15880426013449 is a deficient number, since it is larger than the sum of its proper divisors (1).

15880426013449 is an equidigital number, since it uses as much as digits as its factorization.

15880426013449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 15880426013449 in words is "fifteen trillion, eight hundred eighty billion, four hundred twenty-six million, thirteen thousand, four hundred forty-nine".