781107828082 has 16 divisors (see below), whose sum is σ = 1207182603672. Its totient is φ = 378889038720.

The previous prime is 781107828043. The next prime is 781107828089. The reversal of 781107828082 is 280828701187.

It can be written as a sum of positive squares in 4 ways, for example, as 617923338561 + 163184489521 = 786081^2 + 403961^2 .

It is a super-2 number, since 2×781107828082² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (781107828089) 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, 43843993 + ... + 43861804.

Almost surely, 2^781107828082 is an apocalyptic number.

781107828082 is a deficient number, since it is larger than the sum of its proper divisors (426074775590).

781107828082 is a wasteful number, since it uses less digits than its factorization.

781107828082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87705933.

The product of its (nonzero) digits is 802816, while the sum is 52.

The spelling of 781107828082 in words is "seven hundred eighty-one billion, one hundred seven million, eight hundred twenty-eight thousand, eighty-two".