781018020044 has 24 divisors (see below), whose sum is σ = 1373397480000. Its totient is φ = 388619113680.

The previous prime is 781018020043. The next prime is 781018020053. The reversal of 781018020044 is 440020810187.

781018020044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 781018019986 and 781018020013.

It is not an unprimeable number, because it can be changed into a prime (781018020043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9495407 + ... + 9577305.

It is an arithmetic number, because the mean of its divisors is an integer number (57224895000).

Almost surely, 2^781018020044 is an apocalyptic number.

It is an amenable number.

781018020044 is a deficient number, since it is larger than the sum of its proper divisors (592379459956).

781018020044 is a wasteful number, since it uses less digits than its factorization.

781018020044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93413 (or 93411 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 35.

The spelling of 781018020044 in words is "seven hundred eighty-one billion, eighteen million, twenty thousand, forty-four".