1613949808571 has 4 divisors (see below), whose sum is σ = 1638038611752. Its totient is φ = 1589861005392.

The previous prime is 1613949808553. The next prime is 1613949808609. The reversal of 1613949808571 is 1758089493161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613949808571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1613949807571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12044401490 + ... + 12044401623.

It is an arithmetic number, because the mean of its divisors is an integer number (409509652938).

Almost surely, 2^{1613949808571} is an apocalyptic number.

1613949808571 is a deficient number, since it is larger than the sum of its proper divisors (24088803181).

1613949808571 is an equidigital number, since it uses as much as digits as its factorization.

1613949808571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24088803180.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 1613949808571 in words is "one trillion, six hundred thirteen billion, nine hundred forty-nine million, eight hundred eight thousand, five hundred seventy-one".