161063257 has 8 divisors (see below), whose sum is σ = 166147400. Its totient is φ = 156017664.

The previous prime is 161063249. The next prime is 161063261. The reversal of 161063257 is 752360161.

It can be written as a sum of positive squares in 4 ways, for example, as 123743376 + 37319881 = 11124^2 + 6109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161063257 - 2³ = 161063249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161063267) 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, 1032 + ... + 17977.

It is an arithmetic number, because the mean of its divisors is an integer number (20768425).

Almost surely, 2^161063257 is an apocalyptic number.

It is an amenable number.

161063257 is a deficient number, since it is larger than the sum of its proper divisors (5084143).

161063257 is a wasteful number, since it uses less digits than its factorization.

161063257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19275.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 161063257 is about 12691.0699706526. The cubic root of 161063257 is about 544.0834207872.

The spelling of 161063257 in words is "one hundred sixty-one million, sixty-three thousand, two hundred fifty-seven".