161628268268 has 12 divisors (see below), whose sum is σ = 282855062952. Its totient is φ = 80812536000.

The previous prime is 161628268267. The next prime is 161628268303. The reversal of 161628268268 is 862862826161.

It is a super-2 number, since 2×161628268268² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161628268267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155405 + ... + 589412.

It is an arithmetic number, because the mean of its divisors is an integer number (23571255246).

Almost surely, 2^161628268268 is an apocalyptic number.

It is an amenable number.

161628268268 is a deficient number, since it is larger than the sum of its proper divisors (121226794684).

161628268268 is a wasteful number, since it uses less digits than its factorization.

161628268268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799072 (or 799070 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 56.

The spelling of 161628268268 in words is "one hundred sixty-one billion, six hundred twenty-eight million, two hundred sixty-eight thousand, two hundred sixty-eight".