1964145471 has 4 divisors (see below), whose sum is σ = 2618860632. Its totient is φ = 1309430312.

The previous prime is 1964145457. The next prime is 1964145499. The reversal of 1964145471 is 1745414691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1745414691 = 3 ⋅581804897.

It is a cyclic number.

It is not a de Polignac number, because 1964145471 - 2¹⁴ = 1964129087 is a prime.

It is a super-3 number, since 3×1964145471³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964145571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327357576 + ... + 327357581.

It is an arithmetic number, because the mean of its divisors is an integer number (654715158).

Almost surely, 2^1964145471 is an apocalyptic number.

1964145471 is a deficient number, since it is larger than the sum of its proper divisors (654715161).

1964145471 is an equidigital number, since it uses as much as digits as its factorization.

1964145471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654715160.

The product of its digits is 120960, while the sum is 42.

The square root of 1964145471 is about 44318.6808355122. The cubic root of 1964145471 is about 1252.3466257348.

The spelling of 1964145471 in words is "one billion, nine hundred sixty-four million, one hundred forty-five thousand, four hundred seventy-one".