161945326 has 16 divisors (see below), whose sum is σ = 249434640. Its totient is φ = 78809920.

The previous prime is 161945321. The next prime is 161945327. The reversal of 161945326 is 623549161.

It is a super-2 number, since 2×161945326² = 52452577226492552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161945321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36180 + ... + 40408.

It is an arithmetic number, because the mean of its divisors is an integer number (15589665).

Almost surely, 2^161945326 is an apocalyptic number.

161945326 is a deficient number, since it is larger than the sum of its proper divisors (87489314).

161945326 is a wasteful number, since it uses less digits than its factorization.

161945326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739.

The product of its digits is 38880, while the sum is 37.

The square root of 161945326 is about 12725.7740825460. The cubic root of 161945326 is about 545.0748442509.

The spelling of 161945326 in words is "one hundred sixty-one million, nine hundred forty-five thousand, three hundred twenty-six".