781638488230 has 16 divisors (see below), whose sum is σ = 1430795877840. Its totient is φ = 307356151072.

The previous prime is 781638488167. The next prime is 781638488291. The reversal of 781638488230 is 32884836187.

It is a super-2 number, since 2×781638488230² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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, 662404909 + ... + 662406088.

It is an arithmetic number, because the mean of its divisors is an integer number (89424742365).

Almost surely, 2^781638488230 is an apocalyptic number.

781638488230 is a deficient number, since it is larger than the sum of its proper divisors (649157389610).

781638488230 is a wasteful number, since it uses less digits than its factorization.

781638488230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324811063.

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 781638488230 in words is "seven hundred eighty-one billion, six hundred thirty-eight million, four hundred eighty-eight thousand, two hundred thirty".