15551453630897 has 2 divisors, whose sum is σ = 15551453630898. Its totient is φ = 15551453630896.

The previous prime is 15551453630887. The next prime is 15551453630927. The reversal of 15551453630897 is 79803635415551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15174133369201 + 377320261696 = 3895399^2 + 614264^2 .

It is a cyclic number.

It is not a de Polignac number, because 15551453630897 - 2²⁴ = 15551436853681 is a prime.

It is not a weakly prime, because it can be changed into another prime (15551453630827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775726815448 + 7775726815449.

It is an arithmetic number, because the mean of its divisors is an integer number (7775726815449).

Almost surely, 2^{15551453630897} is an apocalyptic number.

It is an amenable number.

15551453630897 is a deficient number, since it is larger than the sum of its proper divisors (1).

15551453630897 is an equidigital number, since it uses as much as digits as its factorization.

15551453630897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040000, while the sum is 62.

The spelling of 15551453630897 in words is "fifteen trillion, five hundred fifty-one billion, four hundred fifty-three million, six hundred thirty thousand, eight hundred ninety-seven".