161755470 has 48 divisors (see below), whose sum is σ = 428512032. Its totient is φ = 42319680.

The previous prime is 161755457. The next prime is 161755471. The reversal of 161755470 is 74557161.

161755470 is a `hidden beast` number, since 16 + 175 + 5 + 470 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161755471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12186 + ... + 21725.

It is an arithmetic number, because the mean of its divisors is an integer number (8927334).

Almost surely, 2^161755470 is an apocalyptic number.

161755470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161755470 is an abundant number, since it is smaller than the sum of its proper divisors (266756562).

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

161755470 is a wasteful number, since it uses less digits than its factorization.

161755470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33977 (or 33974 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 161755470 is about 12718.3123880490. The cubic root of 161755470 is about 544.8617554698.

The spelling of 161755470 in words is "one hundred sixty-one million, seven hundred fifty-five thousand, four hundred seventy".