1964646964647 has 12 divisors (see below), whose sum is σ = 2929366083904. Its totient is φ = 1267514170560.

The previous prime is 1964646964613. The next prime is 1964646964649. The reversal of 1964646964647 is 7464696464691.

1964646964647 is a `hidden beast` number, since 1 + 9 + 6 + 46 + 469 + 64 + 64 + 7 = 666.

It is not a de Polignac number, because 1964646964647 - 2⁶ = 1964646964583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964646964649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3520872418 + ... + 3520872975.

Almost surely, 2^{1964646964647} is an apocalyptic number.

1964646964647 is a deficient number, since it is larger than the sum of its proper divisors (964719119257).

1964646964647 is a wasteful number, since it uses less digits than its factorization.

1964646964647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7041745430 (or 7041745427 counting only the distinct ones).

The product of its digits is 1128701952, while the sum is 72.

The spelling of 1964646964647 in words is "one trillion, nine hundred sixty-four billion, six hundred forty-six million, nine hundred sixty-four thousand, six hundred forty-seven".