161451171522 has 12 divisors (see below), whose sum is σ = 349810871670. Its totient is φ = 53817057168.

The previous prime is 161451171487. The next prime is 161451171547. The reversal of 161451171522 is 225171154161.

161451171522 is a `hidden beast` number, since 1 + 6 + 14 + 5 + 117 + 1 + 522 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159217758441 + 2233413081 = 399021^2 + 47259^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4484754747 + ... + 4484754782.

Almost surely, 2^161451171522 is an apocalyptic number.

161451171522 is an abundant number, since it is smaller than the sum of its proper divisors (188359700148).

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

161451171522 is a wasteful number, since it uses less digits than its factorization.

161451171522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969509537 (or 8969509534 counting only the distinct ones).

The product of its digits is 16800, while the sum is 36.

The spelling of 161451171522 in words is "one hundred sixty-one billion, four hundred fifty-one million, one hundred seventy-one thousand, five hundred twenty-two".