65772187500 has 96 divisors (see below), whose sum is σ = 191837790144. Its totient is φ = 17539000000.

The previous prime is 65772187499. The next prime is 65772187511. The reversal of 65772187500 is 578127756.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65772187500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902422 + ... + 972578.

It is an arithmetic number, because the mean of its divisors is an integer number (1998310314).

Almost surely, 2^65772187500 is an apocalyptic number.

65772187500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65772187500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95918895072).

65772187500 is an abundant number, since it is smaller than the sum of its proper divisors (126065602644).

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

65772187500 is an frugal number, since it uses more digits than its factorization.

65772187500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70199 (or 70167 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 65772187500 in words is "sixty-five billion, seven hundred seventy-two million, one hundred eighty-seven thousand, five hundred".