1964243161 has 16 divisors (see below), whose sum is σ = 2126887360. Its totient is φ = 1807686720.

The previous prime is 1964243147. The next prime is 1964243243. The reversal of 1964243161 is 1613424691.

It is a cyclic number.

It is not a de Polignac number, because 1964243161 - 2¹⁷ = 1964112089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 1964243161.

It is not an unprimeable number, because it can be changed into a prime (1961243161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 530326 + ... + 534016.

It is an arithmetic number, because the mean of its divisors is an integer number (132930460).

Almost surely, 2^1964243161 is an apocalyptic number.

It is an amenable number.

1964243161 is a deficient number, since it is larger than the sum of its proper divisors (162644199).

1964243161 is a wasteful number, since it uses less digits than its factorization.

1964243161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504.

The product of its digits is 31104, while the sum is 37.

The square root of 1964243161 is about 44319.7829529884. The cubic root of 1964243161 is about 1252.3673878958.

The spelling of 1964243161 in words is "one billion, nine hundred sixty-four million, two hundred forty-three thousand, one hundred sixty-one".