15545000491 has 2 divisors, whose sum is σ = 15545000492. Its totient is φ = 15545000490.

The previous prime is 15545000479. The next prime is 15545000507. The reversal of 15545000491 is 19400054551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15545000491 - 2⁵ = 15545000459 is a prime.

It is not a weakly prime, because it can be changed into another prime (15545000791) 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, 7772500245 + 7772500246.

It is an arithmetic number, because the mean of its divisors is an integer number (7772500246).

Almost surely, 2^15545000491 is an apocalyptic number.

15545000491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15545000491 is an equidigital number, since it uses as much as digits as its factorization.

15545000491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 15545000491 in words is "fifteen billion, five hundred forty-five million, four hundred ninety-one", and thus it is an aban number.