161606055001651 has 16 divisors (see below), whose sum is σ = 176937749148160. Its totient is φ = 146690022453120.

The previous prime is 161606055001613. The next prime is 161606055001663. The reversal of 161606055001651 is 156100550606161.

It is a cyclic number.

It is not a de Polignac number, because 161606055001651 - 2³⁵ = 161571695263283 is a prime.

It is a super-2 number, since 2×161606055001651² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161606055001598 and 161606055001607.

It is not an unprimeable number, because it can be changed into a prime (161606055001681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24335571 + ... + 30256108.

It is an arithmetic number, because the mean of its divisors is an integer number (11058609321760).

Almost surely, 2^{161606055001651} is an apocalyptic number.

161606055001651 is a deficient number, since it is larger than the sum of its proper divisors (15331694146509).

161606055001651 is a wasteful number, since it uses less digits than its factorization.

161606055001651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54595486.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 161606055001651 in words is "one hundred sixty-one trillion, six hundred six billion, fifty-five million, one thousand, six hundred fifty-one".