395280497664 has 660 divisors, whose sum is σ = 1293443310456. Its totient is φ = 120179884032.

The previous prime is 395280497657. The next prime is 395280497687. The reversal of 395280497664 is 466794082593.

395280497664 is a `hidden beast` number, since 3 + 9 + 5 + 2 + 80 + 497 + 6 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2284858282 + ... + 2284858454.

Almost surely, 2^395280497664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 395280497664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646721655228).

395280497664 is an abundant number, since it is smaller than the sum of its proper divisors (898162812792).

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

395280497664 is a wasteful number, since it uses less digits than its factorization.

395280497664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 395280497664 in words is "three hundred ninety-five billion, two hundred eighty million, four hundred ninety-seven thousand, six hundred sixty-four".