161477860 has 12 divisors (see below), whose sum is σ = 339103548. Its totient is φ = 64591136.

The previous prime is 161477831. The next prime is 161477863. The reversal of 161477860 is 68774161.

It can be written as a sum of positive squares in 2 ways, for example, as 64770304 + 96707556 = 8048^2 + 9834^2 .

It is not an unprimeable number, because it can be changed into a prime (161477863) 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 3 ways as a sum of consecutive naturals, for example, 4036927 + ... + 4036966.

It is an arithmetic number, because the mean of its divisors is an integer number (28258629).

Almost surely, 2^161477860 is an apocalyptic number.

161477860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161477860 is an abundant number, since it is smaller than the sum of its proper divisors (177625688).

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

161477860 is a wasteful number, since it uses less digits than its factorization.

161477860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073902 (or 8073900 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 161477860 is about 12707.3939106333. The cubic root of 161477860 is about 544.5498738243.

The spelling of 161477860 in words is "one hundred sixty-one million, four hundred seventy-seven thousand, eight hundred sixty".