964640555 has 4 divisors (see below), whose sum is σ = 1157568672. Its totient is φ = 771712440.

The previous prime is 964640533. The next prime is 964640569. The reversal of 964640555 is 555046469.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555046469 = 1741 ⋅318809.

It is not a de Polignac number, because 964640555 - 2⁶ = 964640491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96464051 + ... + 96464060.

It is an arithmetic number, because the mean of its divisors is an integer number (289392168).

Almost surely, 2^964640555 is an apocalyptic number.

964640555 is a deficient number, since it is larger than the sum of its proper divisors (192928117).

964640555 is a wasteful number, since it uses less digits than its factorization.

964640555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192928116.

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 964640555 is about 31058.6631231932. The cubic root of 964640555 is about 988.0718021517.

The spelling of 964640555 in words is "nine hundred sixty-four million, six hundred forty thousand, five hundred fifty-five".