6425665295280 has 320 divisors, whose sum is σ = 25133999321088. Its totient is φ = 1319116078080.

The previous prime is 6425665295261. The next prime is 6425665295281. The reversal of 6425665295280 is 825925665246.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (6425665295281) 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, 560794 + ... + 3628473.

Almost surely, 2^{6425665295280} is an apocalyptic number.

6425665295280 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 6425665295280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12566999660544).

6425665295280 is an abundant number, since it is smaller than the sum of its proper divisors (18708334025808).

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

6425665295280 is a wasteful number, since it uses less digits than its factorization.

6425665295280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189384 (or 4189378 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 60.

The spelling of 6425665295280 in words is "six trillion, four hundred twenty-five billion, six hundred sixty-five million, two hundred ninety-five thousand, two hundred eighty".