6450784399280 has 80 divisors (see below), whose sum is σ = 17101875972384. Its totient is φ = 2241720545280.

The previous prime is 6450784399231. The next prime is 6450784399309. The reversal of 6450784399280 is 829934870546.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×6450784399280² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182414006 + ... + 182449365.

Almost surely, 2^{6450784399280} is an apocalyptic number.

It is an amenable number.

6450784399280 is an abundant number, since it is smaller than the sum of its proper divisors (10651091573104).

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

6450784399280 is a wasteful number, since it uses less digits than its factorization.

6450784399280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364863414 (or 364863408 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 6450784399280 in words is "six trillion, four hundred fifty billion, seven hundred eighty-four million, three hundred ninety-nine thousand, two hundred eighty".