781842294860 has 48 divisors (see below), whose sum is σ = 1791421132032. Its totient is φ = 284260017600.

The previous prime is 781842294851. The next prime is 781842294869. The reversal of 781842294860 is 68492248187.

It is an interprime number because it is at equal distance from previous prime (781842294851) and next prime (781842294869).

It is a super-2 number, since 2×781842294860² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 781842294860.

It is not an unprimeable number, because it can be changed into a prime (781842294869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080329 + ... + 1652511.

It is an arithmetic number, because the mean of its divisors is an integer number (37321273584).

Almost surely, 2^781842294860 is an apocalyptic number.

It is an amenable number.

781842294860 is an abundant number, since it is smaller than the sum of its proper divisors (1009578837172).

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

781842294860 is a wasteful number, since it uses less digits than its factorization.

781842294860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578414 (or 578412 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 59.

The spelling of 781842294860 in words is "seven hundred eighty-one billion, eight hundred forty-two million, two hundred ninety-four thousand, eight hundred sixty".