65474680320 has 640 divisors, whose sum is σ = 268084270080. Its totient is φ = 14837022720.

The previous prime is 65474680319. The next prime is 65474680321. The reversal of 65474680320 is 2308647456.

65474680320 is a `hidden beast` number, since 6 + 547 + 4 + 6 + 80 + 3 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (65474680319) and next prime (65474680321).

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65474680321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63382524 + ... + 63383556.

It is an arithmetic number, because the mean of its divisors is an integer number (418881672).

Almost surely, 2^65474680320 is an apocalyptic number.

65474680320 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 65474680320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134042135040).

65474680320 is an abundant number, since it is smaller than the sum of its proper divisors (202609589760).

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

65474680320 is a wasteful number, since it uses less digits than its factorization.

65474680320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 65474680320 in words is "sixty-five billion, four hundred seventy-four million, six hundred eighty thousand, three hundred twenty".