395561249280 has 640 divisors, whose sum is σ = 1484904960000. Its totient is φ = 99534127104.

The previous prime is 395561249273. The next prime is 395561249333. The reversal of 395561249280 is 82942165593.

395561249280 is a `hidden beast` number, since 3 + 9 + 556 + 1 + 2 + 4 + 9 + 2 + 80 = 666.

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 (54).

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, 471467101 + ... + 471467939.

It is an arithmetic number, because the mean of its divisors is an integer number (2320164000).

Almost surely, 2^395561249280 is an apocalyptic number.

395561249280 is a gapful number since it is divisible by the number (30) 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 395561249280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742452480000).

395561249280 is an abundant number, since it is smaller than the sum of its proper divisors (1089343710720).

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

395561249280 is a wasteful number, since it uses less digits than its factorization.

395561249280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 395561249280 in words is "three hundred ninety-five billion, five hundred sixty-one million, two hundred forty-nine thousand, two hundred eighty".