64490648971 has 8 divisors (see below), whose sum is σ = 73800455904. Its totient is φ = 55205056320.

The previous prime is 64490648969. The next prime is 64490648983. The reversal of 64490648971 is 17984609446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64490648971 - 2¹ = 64490648969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64490648921) by changing a digit.

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, 6047860 + ... + 6058513.

It is an arithmetic number, because the mean of its divisors is an integer number (9225056988).

Almost surely, 2^64490648971 is an apocalyptic number.

64490648971 is a deficient number, since it is larger than the sum of its proper divisors (9309806933).

64490648971 is a wasteful number, since it uses less digits than its factorization.

64490648971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12107141.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 64490648971 in words is "sixty-four billion, four hundred ninety million, six hundred forty-eight thousand, nine hundred seventy-one".