64570190668 has 24 divisors (see below), whose sum is σ = 115446953664. Its totient is φ = 31585881600.

The previous prime is 64570190647. The next prime is 64570190683. The reversal of 64570190668 is 86609107546.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 427228 + ... + 558268.

It is an arithmetic number, because the mean of its divisors is an integer number (4810289736).

Almost surely, 2^64570190668 is an apocalyptic number.

It is an amenable number.

64570190668 is a deficient number, since it is larger than the sum of its proper divisors (50876762996).

64570190668 is a wasteful number, since it uses less digits than its factorization.

64570190668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133713 (or 133711 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 64570190668 in words is "sixty-four billion, five hundred seventy million, one hundred ninety thousand, six hundred sixty-eight".