260420783680 has 56 divisors (see below), whose sum is σ = 620328822840. Its totient is φ = 104134410240.

The previous prime is 260420783663. The next prime is 260420783699. The reversal of 260420783680 is 86387024062.

It can be written as a sum of positive squares in 4 ways, for example, as 4659973696 + 255760809984 = 68264^2 + 505728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 260420783680.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864000 + ... + 1125760.

Almost surely, 2^260420783680 is an apocalyptic number.

260420783680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260420783680 is an abundant number, since it is smaller than the sum of its proper divisors (359908039160).

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

260420783680 is a wasteful number, since it uses less digits than its factorization.

260420783680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264887 (or 264877 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 260420783680 in words is "two hundred sixty billion, four hundred twenty million, seven hundred eighty-three thousand, six hundred eighty".