161616150051566 has 16 divisors (see below), whose sum is σ = 278657738491104. Its totient is φ = 68863693992864.

The previous prime is 161616150051529. The next prime is 161616150051569. The reversal of 161616150051566 is 665150051616161.

It is a super-2 number, since 2×161616150051566² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616150051569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33364190405 + ... + 33364195248.

It is an arithmetic number, because the mean of its divisors is an integer number (17416108655694).

Almost surely, 2^{161616150051566} is an apocalyptic number.

161616150051566 is a deficient number, since it is larger than the sum of its proper divisors (117041588439538).

161616150051566 is a wasteful number, since it uses less digits than its factorization.

161616150051566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66728385835.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 161616150051566 in words is "one hundred sixty-one trillion, six hundred sixteen billion, one hundred fifty million, fifty-one thousand, five hundred sixty-six".