781003601027 has 10 divisors (see below), whose sum is σ = 846084986628. Its totient is φ = 720926374584.

The previous prime is 781003601003. The next prime is 781003601029. The reversal of 781003601027 is 720106300187.

It is a de Polignac number, because none of the positive numbers 2^k-781003601027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (781003601029) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13643993 + ... + 13701114.

Almost surely, 2^781003601027 is an apocalyptic number.

781003601027 is a deficient number, since it is larger than the sum of its proper divisors (65081385601).

781003601027 is an frugal number, since it uses more digits than its factorization.

781003601027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27345159 (or 27345120 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 781003601027 in words is "seven hundred eighty-one billion, three million, six hundred one thousand, twenty-seven".