4191516201623 has 2 divisors, whose sum is σ = 4191516201624. Its totient is φ = 4191516201622.

The previous prime is 4191516201547. The next prime is 4191516201629. The reversal of 4191516201623 is 3261026151914.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4191516201623 is a prime.

It is a super-3 number, since 3×4191516201623³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4191516201629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2095758100811 + 2095758100812.

It is an arithmetic number, because the mean of its divisors is an integer number (2095758100812).

Almost surely, 2^{4191516201623} is an apocalyptic number.

4191516201623 is a deficient number, since it is larger than the sum of its proper divisors (1).

4191516201623 is an equidigital number, since it uses as much as digits as its factorization.

4191516201623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 4191516201623 in words is "four trillion, one hundred ninety-one billion, five hundred sixteen million, two hundred one thousand, six hundred twenty-three".