16719255491 has 2 divisors, whose sum is σ = 16719255492. Its totient is φ = 16719255490.

The previous prime is 16719255463. The next prime is 16719255541. The reversal of 16719255491 is 19455291761.

It is a happy number.

It is an a-pointer prime, because the next prime (16719255541) can be obtained adding 16719255491 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16719255491 is a prime.

It is not a weakly prime, because it can be changed into another prime (16719255431) 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, 8359627745 + 8359627746.

It is an arithmetic number, because the mean of its divisors is an integer number (8359627746).

Almost surely, 2^16719255491 is an apocalyptic number.

16719255491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16719255491 is an equidigital number, since it uses as much as digits as its factorization.

16719255491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 50.

The spelling of 16719255491 in words is "sixteen billion, seven hundred nineteen million, two hundred fifty-five thousand, four hundred ninety-one".