161154778482 has 24 divisors (see below), whose sum is σ = 349332775740. Its totient is φ = 53693015040.

The previous prime is 161154778451. The next prime is 161154778487. The reversal of 161154778482 is 284877451161.

It is a happy number.

161154778482 is a `hidden beast` number, since 1 + 6 + 1 + 15 + 477 + 84 + 82 = 666.

161154778482 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 156989495961 + 4165282521 = 396219^2 + 64539^2 .

It is not an unprimeable number, because it can be changed into a prime (161154778487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2064319 + ... + 2140962.

Almost surely, 2^161154778482 is an apocalyptic number.

161154778482 is an abundant number, since it is smaller than the sum of its proper divisors (188177997258).

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

161154778482 is a wasteful number, since it uses less digits than its factorization.

161154778482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207418 (or 4207415 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The spelling of 161154778482 in words is "one hundred sixty-one billion, one hundred fifty-four million, seven hundred seventy-eight thousand, four hundred eighty-two".