780799989444 has 48 divisors (see below), whose sum is σ = 1901150079360. Its totient is φ = 248941313280.

The previous prime is 780799989433. The next prime is 780799989479. The reversal of 780799989444 is 444989997087.

It is a super-2 number, since 2×780799989444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 780799989444.

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, 13252002 + ... + 13310790.

It is an arithmetic number, because the mean of its divisors is an integer number (39607293320).

Almost surely, 2^780799989444 is an apocalyptic number.

It is an amenable number.

780799989444 is an abundant number, since it is smaller than the sum of its proper divisors (1120350089916).

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

780799989444 is a wasteful number, since it uses less digits than its factorization.

780799989444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106940 (or 106938 counting only the distinct ones).

The product of its (nonzero) digits is 1316818944, while the sum is 78.

The spelling of 780799989444 in words is "seven hundred eighty billion, seven hundred ninety-nine million, nine hundred eighty-nine thousand, four hundred forty-four".