64671575876783 has 4 divisors (see below), whose sum is σ = 66757755743808. Its totient is φ = 62585396009760.

The previous prime is 64671575876779. The next prime is 64671575876797. The reversal of 64671575876783 is 38767857517646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64671575876783 - 2² = 64671575876779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64671575876698 and 64671575876707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64671275876783) 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, 1043089933466 + ... + 1043089933527.

It is an arithmetic number, because the mean of its divisors is an integer number (16689438935952).

Almost surely, 2^{64671575876783} is an apocalyptic number.

64671575876783 is a deficient number, since it is larger than the sum of its proper divisors (2086179867025).

64671575876783 is a wasteful number, since it uses less digits than its factorization.

64671575876783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086179867024.

The product of its digits is 9957427200, while the sum is 80.

The spelling of 64671575876783 in words is "sixty-four trillion, six hundred seventy-one billion, five hundred seventy-five million, eight hundred seventy-six thousand, seven hundred eighty-three".