161255710 has 128 divisors (see below), whose sum is σ = 390168576. Its totient is φ = 46448640.

The previous prime is 161255687. The next prime is 161255767. The reversal of 161255710 is 17552161.

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 63 ways as a sum of consecutive naturals, for example, 1269667 + ... + 1269793.

It is an arithmetic number, because the mean of its divisors is an integer number (3048192).

Almost surely, 2^161255710 is an apocalyptic number.

161255710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161255710 is an abundant number, since it is smaller than the sum of its proper divisors (228912866).

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

161255710 is a wasteful number, since it uses less digits than its factorization.

161255710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 161255710 is about 12698.6499282404. The cubic root of 161255710 is about 544.3000412843.

The spelling of 161255710 in words is "one hundred sixty-one million, two hundred fifty-five thousand, seven hundred ten".