64819273020 has 48 divisors (see below), whose sum is σ = 181658695680. Its totient is φ = 17269450816.

The previous prime is 64819273019. The next prime is 64819273027. The reversal of 64819273020 is 2037291846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64819273027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 423540 + ... + 555899.

It is an arithmetic number, because the mean of its divisors is an integer number (3784556160).

Almost surely, 2^64819273020 is an apocalyptic number.

64819273020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64819273020 is an abundant number, since it is smaller than the sum of its proper divisors (116839422660).

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

64819273020 is a wasteful number, since it uses less digits than its factorization.

64819273020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980554 (or 980552 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 64819273020 in words is "sixty-four billion, eight hundred nineteen million, two hundred seventy-three thousand, twenty".