161051066460 has 72 divisors (see below), whose sum is σ = 491345487360. Its totient is φ = 42698694528.

The previous prime is 161051066443. The next prime is 161051066471. The reversal of 161051066460 is 64660150161.

It is a happy number.

161051066460 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 5 + 1 + 0 + 6 + 646 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2554780 + ... + 2617059.

It is an arithmetic number, because the mean of its divisors is an integer number (6824242880).

Almost surely, 2^161051066460 is an apocalyptic number.

161051066460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161051066460 is an abundant number, since it is smaller than the sum of its proper divisors (330294420900).

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

161051066460 is a wasteful number, since it uses less digits than its factorization.

161051066460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172027 (or 5172022 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 161051066460 in words is "one hundred sixty-one billion, fifty-one million, sixty-six thousand, four hundred sixty".