64973620020 has 24 divisors (see below), whose sum is σ = 181926136224. Its totient is φ = 17326298656.

The previous prime is 64973619983. The next prime is 64973620021. The reversal of 64973620020 is 2002637946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64973620021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541446774 + ... + 541446893.

It is an arithmetic number, because the mean of its divisors is an integer number (7580255676).

Almost surely, 2^64973620020 is an apocalyptic number.

64973620020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64973620020 is an abundant number, since it is smaller than the sum of its proper divisors (116952516204).

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

64973620020 is a wasteful number, since it uses less digits than its factorization.

64973620020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082893679 (or 1082893677 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The spelling of 64973620020 in words is "sixty-four billion, nine hundred seventy-three million, six hundred twenty thousand, twenty".