161606155016587 has 2 divisors, whose sum is σ = 161606155016588. Its totient is φ = 161606155016586.

The previous prime is 161606155016573. The next prime is 161606155016611. The reversal of 161606155016587 is 785610551606161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161606155016587 - 2¹¹ = 161606155014539 is a prime.

It is a super-2 number, since 2×161606155016587² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161606155016567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803077508293 + 80803077508294.

It is an arithmetic number, because the mean of its divisors is an integer number (80803077508294).

Almost surely, 2^{161606155016587} is an apocalyptic number.

161606155016587 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606155016587 is an equidigital number, since it uses as much as digits as its factorization.

161606155016587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 58.

The spelling of 161606155016587 in words is "one hundred sixty-one trillion, six hundred six billion, one hundred fifty-five million, sixteen thousand, five hundred eighty-seven".