65294785920 has 1536 divisors, whose sum is σ = 290293632000. Its totient is φ = 12145655808.

The previous prime is 65294785877. The next prime is 65294785957. The reversal of 65294785920 is 2958749256.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 733649236 + ... + 733649324.

It is an arithmetic number, because the mean of its divisors is an integer number (188993250).

Almost surely, 2^65294785920 is an apocalyptic number.

65294785920 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 65294785920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145146816000).

65294785920 is an abundant number, since it is smaller than the sum of its proper divisors (224998846080).

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

65294785920 is a wasteful number, since it uses less digits than its factorization.

65294785920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 57.

The spelling of 65294785920 in words is "sixty-five billion, two hundred ninety-four million, seven hundred eighty-five thousand, nine hundred twenty".