161366055472 has 40 divisors (see below), whose sum is σ = 329130514160. Its totient is φ = 76429889280.

The previous prime is 161366055457. The next prime is 161366055509. The reversal of 161366055472 is 274550663161.

It is a super-2 number, since 2×161366055472² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6375322 + ... + 6400582.

It is an arithmetic number, because the mean of its divisors is an integer number (8228262854).

Almost surely, 2^161366055472 is an apocalyptic number.

It is an amenable number.

161366055472 is an abundant number, since it is smaller than the sum of its proper divisors (167764458688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161366055472 is a wasteful number, since it uses less digits than its factorization.

161366055472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46301 (or 46295 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 161366055472 in words is "one hundred sixty-one billion, three hundred sixty-six million, fifty-five thousand, four hundred seventy-two".