1616941857187 has 2 divisors, whose sum is σ = 1616941857188. Its totient is φ = 1616941857186.

The previous prime is 1616941857137. The next prime is 1616941857211. The reversal of 1616941857187 is 7817581496161.

It is a strong prime.

It is an emirp because it is prime and its reverse (7817581496161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616941857187 is a prime.

It is a super-2 number, since 2×1616941857187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616941857107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808470928593 + 808470928594.

It is an arithmetic number, because the mean of its divisors is an integer number (808470928594).

Almost surely, 2^{1616941857187} is an apocalyptic number.

1616941857187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616941857187 is an equidigital number, since it uses as much as digits as its factorization.

1616941857187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 64.

The spelling of 1616941857187 in words is "one trillion, six hundred sixteen billion, nine hundred forty-one million, eight hundred fifty-seven thousand, one hundred eighty-seven".