1964240161 has 8 divisors (see below), whose sum is σ = 2115688064. Its totient is φ = 1812842640.

The previous prime is 1964240149. The next prime is 1964240171. The reversal of 1964240161 is 1610424691.

It is a happy number.

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 1964240161 - 2¹¹ = 1964238113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964240111) 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, 120670 + ... + 135976.

It is an arithmetic number, because the mean of its divisors is an integer number (264461008).

Almost surely, 2^1964240161 is an apocalyptic number.

It is an amenable number.

1964240161 is a deficient number, since it is larger than the sum of its proper divisors (151447903).

1964240161 is a wasteful number, since it uses less digits than its factorization.

1964240161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25191.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1964240161 is about 44319.7491080444. The cubic root of 1964240161 is about 1252.3667503128.

The spelling of 1964240161 in words is "one billion, nine hundred sixty-four million, two hundred forty thousand, one hundred sixty-one".