260220657840 has 640 divisors, whose sum is σ = 1012597189632. Its totient is φ = 54307061760.

The previous prime is 260220657769. The next prime is 260220657869. The reversal of 260220657840 is 48756022062.

It is a junction number, because it is equal to n+sod(n) for n = 260220657792 and 260220657801.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 65926747 + ... + 65930693.

Almost surely, 2^260220657840 is an apocalyptic number.

260220657840 is a gapful number since it is divisible by the number (20) 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 260220657840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506298594816).

260220657840 is an abundant number, since it is smaller than the sum of its proper divisors (752376531792).

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

260220657840 is a wasteful number, since it uses less digits than its factorization.

260220657840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4117 (or 4111 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 260220657840 in words is "two hundred sixty billion, two hundred twenty million, six hundred fifty-seven thousand, eight hundred forty".