1964166457 has 4 divisors (see below), whose sum is σ = 2142727056. Its totient is φ = 1785605860.

The previous prime is 1964166437. The next prime is 1964166469. The reversal of 1964166457 is 7546614691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1964166457 - 2⁷ = 1964166329 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1964166457.

It is not an unprimeable number, because it can be changed into a prime (1964166437) 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, 89280283 + ... + 89280304.

It is an arithmetic number, because the mean of its divisors is an integer number (535681764).

Almost surely, 2^1964166457 is an apocalyptic number.

It is an amenable number.

1964166457 is a deficient number, since it is larger than the sum of its proper divisors (178560599).

1964166457 is a wasteful number, since it uses less digits than its factorization.

1964166457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178560598.

The product of its digits is 1088640, while the sum is 49.

The square root of 1964166457 is about 44318.9175973421. The cubic root of 1964166457 is about 1252.3510859700.

The spelling of 1964166457 in words is "one billion, nine hundred sixty-four million, one hundred sixty-six thousand, four hundred fifty-seven".