781838112132 has 120 divisors (see below), whose sum is σ = 2548213187520. Its totient is φ = 203074827840.

The previous prime is 781838112113. The next prime is 781838112157. The reversal of 781838112132 is 231211838187.

It is a super-2 number, since 2×781838112132² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15644407 + ... + 15694302.

It is an arithmetic number, because the mean of its divisors is an integer number (21235109896).

Almost surely, 2^781838112132 is an apocalyptic number.

It is an amenable number.

781838112132 is an abundant number, since it is smaller than the sum of its proper divisors (1766375075388).

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

781838112132 is a wasteful number, since it uses less digits than its factorization.

781838112132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31338743 (or 31338732 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The spelling of 781838112132 in words is "seven hundred eighty-one billion, eight hundred thirty-eight million, one hundred twelve thousand, one hundred thirty-two".