64773500000 has 168 divisors, whose sum is σ = 173907305208. Its totient is φ = 23552000000.

The previous prime is 64773499981. The next prime is 64773500023. The reversal of 64773500000 is 537746.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 64773500000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5494112 + ... + 5505888.

It is an arithmetic number, because the mean of its divisors is an integer number (1035162531).

Almost surely, 2^64773500000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64773500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86953652604).

64773500000 is an abundant number, since it is smaller than the sum of its proper divisors (109133805208).

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

64773500000 is an equidigital number, since it uses as much as digits as its factorization.

64773500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828 (or 11795 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The spelling of 64773500000 in words is "sixty-four billion, seven hundred seventy-three million, five hundred thousand".