781432280880 has 160 divisors (see below), whose sum is σ = 2614928348160. Its totient is φ = 192448650240.

The previous prime is 781432280813. The next prime is 781432280917. The reversal of 781432280880 is 88082234187.

It is a super-2 number, since 2×781432280880² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2280676 + ... + 2600835.

It is an arithmetic number, because the mean of its divisors is an integer number (16343302176).

Almost surely, 2^781432280880 is an apocalyptic number.

It is an amenable number.

781432280880 is an abundant number, since it is smaller than the sum of its proper divisors (1833496067280).

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

781432280880 is a wasteful number, since it uses less digits than its factorization.

781432280880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881579 (or 4881573 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The spelling of 781432280880 in words is "seven hundred eighty-one billion, four hundred thirty-two million, two hundred eighty thousand, eight hundred eighty".