161587062656101 has 16 divisors (see below), whose sum is σ = 166588855156080. Its totient is φ = 156635853304320.

The previous prime is 161587062656081. The next prime is 161587062656161. The reversal of 161587062656101 is 101656260785161.

It is a Cunningham number, because it is equal to 12711690²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 26262816575076 + 135324246081025 = 5124726^2 + 11632895^2 .

It is a cyclic number.

It is not a de Polignac number, because 161587062656101 - 2⁵ = 161587062656069 is a prime.

It is a super-2 number, since 2×161587062656101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161587062656161) 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, 174037635 + ... + 174963631.

It is an arithmetic number, because the mean of its divisors is an integer number (10411803447255).

Almost surely, 2^{161587062656101} is an apocalyptic number.

It is an amenable number.

161587062656101 is a deficient number, since it is larger than the sum of its proper divisors (5001792499979).

161587062656101 is a wasteful number, since it uses less digits than its factorization.

161587062656101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953304.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 161587062656101 in words is "one hundred sixty-one trillion, five hundred eighty-seven billion, sixty-two million, six hundred fifty-six thousand, one hundred one".