161663037410387 has 2 divisors, whose sum is σ = 161663037410388. Its totient is φ = 161663037410386.

The previous prime is 161663037410383. The next prime is 161663037410401. The reversal of 161663037410387 is 783014730366161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161663037410387 - 2² = 161663037410383 is a prime.

It is a super-2 number, since 2×161663037410387² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161663037410383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80831518705193 + 80831518705194.

It is an arithmetic number, because the mean of its divisors is an integer number (80831518705194).

Almost surely, 2^{161663037410387} is an apocalyptic number.

161663037410387 is a deficient number, since it is larger than the sum of its proper divisors (1).

161663037410387 is an equidigital number, since it uses as much as digits as its factorization.

161663037410387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 56.

The spelling of 161663037410387 in words is "one hundred sixty-one trillion, six hundred sixty-three billion, thirty-seven million, four hundred ten thousand, three hundred eighty-seven".