64530727986 has 8 divisors (see below), whose sum is σ = 129061455984. Its totient is φ = 21510242660.

The previous prime is 64530727927. The next prime is 64530728023. The reversal of 64530727986 is 68972703546.

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

64530727986 is an admirable 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, 5377560660 + ... + 5377560671.

It is an arithmetic number, because the mean of its divisors is an integer number (16132681998).

Almost surely, 2^64530727986 is an apocalyptic number.

64530727986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64530727986 is a wasteful number, since it uses less digits than its factorization.

64530727986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10755121336.

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 64530727986 in words is "sixty-four billion, five hundred thirty million, seven hundred twenty-seven thousand, nine hundred eighty-six".