16613970491 has 2 divisors, whose sum is σ = 16613970492. Its totient is φ = 16613970490.

The previous prime is 16613970487. The next prime is 16613970563. The reversal of 16613970491 is 19407931661.

It is a weak prime.

It is an emirp because it is prime and its reverse (19407931661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16613970491 - 2² = 16613970487 is a prime.

It is not a weakly prime, because it can be changed into another prime (16613970091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8306985245 + 8306985246.

It is an arithmetic number, because the mean of its divisors is an integer number (8306985246).

Almost surely, 2^16613970491 is an apocalyptic number.

16613970491 is a deficient number, since it is larger than the sum of its proper divisors (1).

16613970491 is an equidigital number, since it uses as much as digits as its factorization.

16613970491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 16613970491 in words is "sixteen billion, six hundred thirteen million, nine hundred seventy thousand, four hundred ninety-one".