161526061 has 4 divisors (see below), whose sum is σ = 171027612. Its totient is φ = 152024512.

The previous prime is 161526031. The next prime is 161526073. The reversal of 161526061 is 160625161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150675625 + 10850436 = 12275^2 + 3294^2 .

It is a cyclic number.

It is not a de Polignac number, because 161526061 - 2⁷ = 161525933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161526031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4750750 + ... + 4750783.

It is an arithmetic number, because the mean of its divisors is an integer number (42756903).

Almost surely, 2^161526061 is an apocalyptic number.

It is an amenable number.

161526061 is a deficient number, since it is larger than the sum of its proper divisors (9501551).

161526061 is an equidigital number, since it uses as much as digits as its factorization.

161526061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9501550.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161526061 is about 12709.2903421080. The cubic root of 161526061 is about 544.6040509878.

The spelling of 161526061 in words is "one hundred sixty-one million, five hundred twenty-six thousand, sixty-one".