161545323545416 has 16 divisors (see below), whose sum is σ = 302908112667900. Its totient is φ = 80769826833984.

The previous prime is 161545323545401. The next prime is 161545323545527. The reversal of 161545323545416 is 614545323545161.

It can be written as a sum of positive squares in 2 ways, for example, as 158524366697316 + 3020956848100 = 12590646^2 + 1738090^2 .

It is a super-2 number, since 2×161545323545416² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354125151 + ... + 354581038.

Almost surely, 2^{161545323545416} is an apocalyptic number.

It is an amenable number.

161545323545416 is a deficient number, since it is larger than the sum of its proper divisors (141362789122484).

161545323545416 is a wasteful number, since it uses less digits than its factorization.

161545323545416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708734688 (or 708734684 counting only the distinct ones).

The product of its digits is 25920000, while the sum is 55.

The spelling of 161545323545416 in words is "one hundred sixty-one trillion, five hundred forty-five billion, three hundred twenty-three million, five hundred forty-five thousand, four hundred sixteen".