64851839294 has 48 divisors (see below), whose sum is σ = 107655537024. Its totient is φ = 29277423120.

The previous prime is 64851839291. The next prime is 64851839321. The reversal of 64851839294 is 49293815846.

It is a happy number.

It is a super-2 number, since 2×64851839294² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64851839291) 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 23 ways as a sum of consecutive naturals, for example, 27630629 + ... + 27632975.

It is an arithmetic number, because the mean of its divisors is an integer number (2242823688).

Almost surely, 2^64851839294 is an apocalyptic number.

64851839294 is a deficient number, since it is larger than the sum of its proper divisors (42803697730).

64851839294 is a wasteful number, since it uses less digits than its factorization.

64851839294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101 (or 3090 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 59.

The spelling of 64851839294 in words is "sixty-four billion, eight hundred fifty-one million, eight hundred thirty-nine thousand, two hundred ninety-four".