65318452920 has 256 divisors, whose sum is σ = 253528704000. Its totient is φ = 14648145408.

The previous prime is 65318452919. The next prime is 65318452943. The reversal of 65318452920 is 2925481356.

65318452920 is a `hidden beast` number, since 6 + 5 + 318 + 45 + 292 + 0 = 666.

It is a hoax number, since the sum of its digits (45) 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 319171 + ... + 482189.

It is an arithmetic number, because the mean of its divisors is an integer number (990346500).

Almost surely, 2^65318452920 is an apocalyptic number.

65318452920 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 65318452920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126764352000).

65318452920 is an abundant number, since it is smaller than the sum of its proper divisors (188210251080).

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

65318452920 is a wasteful number, since it uses less digits than its factorization.

65318452920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163099 (or 163089 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 65318452920 in words is "sixty-five billion, three hundred eighteen million, four hundred fifty-two thousand, nine hundred twenty".