15545253491 has 2 divisors, whose sum is σ = 15545253492. Its totient is φ = 15545253490.

The previous prime is 15545253469. The next prime is 15545253523. The reversal of 15545253491 is 19435254551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15545253491 - 2²² = 15541059187 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (15545253791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7772626745 + 7772626746.

It is an arithmetic number, because the mean of its divisors is an integer number (7772626746).

Almost surely, 2^15545253491 is an apocalyptic number.

15545253491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15545253491 is an equidigital number, since it uses as much as digits as its factorization.

15545253491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540000, while the sum is 44.

The spelling of 15545253491 in words is "fifteen billion, five hundred forty-five million, two hundred fifty-three thousand, four hundred ninety-one".