1613211575971 has 2 divisors, whose sum is σ = 1613211575972. Its totient is φ = 1613211575970.

The previous prime is 1613211575957. The next prime is 1613211576059. The reversal of 1613211575971 is 1795751123161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1613211575971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1613211575471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 806605787985 + 806605787986.

It is an arithmetic number, because the mean of its divisors is an integer number (806605787986).

Almost surely, 2^{1613211575971} is an apocalyptic number.

1613211575971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1613211575971 is an equidigital number, since it uses as much as digits as its factorization.

1613211575971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 49.

The spelling of 1613211575971 in words is "one trillion, six hundred thirteen billion, two hundred eleven million, five hundred seventy-five thousand, nine hundred seventy-one".