161606010566055 has 64 divisors (see below), whose sum is σ = 284891423671296. Its totient is φ = 77572475520000.

The previous prime is 161606010566051. The next prime is 161606010566059. The reversal of 161606010566055 is 550665010606161.

It is an interprime number because it is at equal distance from previous prime (161606010566051) and next prime (161606010566059).

It is not a de Polignac number, because 161606010566055 - 2² = 161606010566051 is a prime.

It is a super-2 number, since 2×161606010566055² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606010565995 and 161606010566013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606010566051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 212782947 + ... + 213541083.

It is an arithmetic number, because the mean of its divisors is an integer number (4451428494864).

Almost surely, 2^{161606010566055} is an apocalyptic number.

161606010566055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161606010566055 is a deficient number, since it is larger than the sum of its proper divisors (123285413105241).

161606010566055 is a wasteful number, since it uses less digits than its factorization.

161606010566055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771048.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 161606010566055 in words is "one hundred sixty-one trillion, six hundred six billion, ten million, five hundred sixty-six thousand, fifty-five".