64450842985 has 8 divisors (see below), whose sum is σ = 77342408640. Its totient is φ = 51559743024.

The previous prime is 64450842979. The next prime is 64450842997. The reversal of 64450842985 is 58924805446.

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 64450842985 - 2¹³ = 64450834793 is a prime.

It is a super-2 number, since 2×64450842985² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382204 + ... + 524386.

It is an arithmetic number, because the mean of its divisors is an integer number (9667801080).

Almost surely, 2^64450842985 is an apocalyptic number.

It is an amenable number.

64450842985 is a deficient number, since it is larger than the sum of its proper divisors (12891565655).

64450842985 is a wasteful number, since it uses less digits than its factorization.

64450842985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232847.

The product of its (nonzero) digits is 11059200, while the sum is 55.

The spelling of 64450842985 in words is "sixty-four billion, four hundred fifty million, eight hundred forty-two thousand, nine hundred eighty-five".