161860870 has 16 divisors (see below), whose sum is σ = 292090608. Its totient is φ = 64579680.

The previous prime is 161860841. The next prime is 161860871. The reversal of 161860870 is 78068161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161860871) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16416 + ... + 24355.

It is an arithmetic number, because the mean of its divisors is an integer number (18255663).

Almost surely, 2^161860870 is an apocalyptic number.

161860870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161860870 is a deficient number, since it is larger than the sum of its proper divisors (130229738).

161860870 is a wasteful number, since it uses less digits than its factorization.

161860870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41175.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 161860870 is about 12722.4553447831. The cubic root of 161860870 is about 544.9800739004.

The spelling of 161860870 in words is "one hundred sixty-one million, eight hundred sixty thousand, eight hundred seventy".