161047638 has 24 divisors (see below), whose sum is σ = 349584768. Its totient is φ = 53582832.

The previous prime is 161047597. The next prime is 161047657. The reversal of 161047638 is 836740161.

161047638 is a `hidden beast` number, since 1 + 6 + 10 + 4 + 7 + 638 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1995 + ... + 18057.

It is an arithmetic number, because the mean of its divisors is an integer number (14566032).

Almost surely, 2^161047638 is an apocalyptic number.

161047638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

161047638 is an abundant number, since it is smaller than the sum of its proper divisors (188537130).

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

161047638 is a wasteful number, since it uses less digits than its factorization.

161047638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628 (or 16625 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 161047638 is about 12690.4546017863. The cubic root of 161047638 is about 544.0658328453.

Adding to 161047638 its reverse (836740161), we get a palindrome (997787799).

The spelling of 161047638 in words is "one hundred sixty-one million, forty-seven thousand, six hundred thirty-eight".