280668714664 has 64 divisors (see below), whose sum is σ = 601370058240. Its totient is φ = 121655761920.

The previous prime is 280668714659. The next prime is 280668714671. The reversal of 280668714664 is 466417866082.

It is a super-2 number, since 2×280668714664² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280668714599 and 280668714608.

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, 647149 + ... + 990019.

It is an arithmetic number, because the mean of its divisors is an integer number (9396407160).

Almost surely, 2^280668714664 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 280668714664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300685029120).

280668714664 is an abundant number, since it is smaller than the sum of its proper divisors (320701343576).

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

280668714664 is a wasteful number, since it uses less digits than its factorization.

280668714664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343370 (or 343366 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 58.

The spelling of 280668714664 in words is "two hundred eighty billion, six hundred sixty-eight million, seven hundred fourteen thousand, six hundred sixty-four".