787142781816 has 64 divisors (see below), whose sum is σ = 2071673788800. Its totient is φ = 248541955200.

The previous prime is 787142781787. The next prime is 787142781857. The reversal of 787142781816 is 618187241787.

It is a self number, because there is not a number n which added to its sum of digits gives 787142781816.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3924531 + ... + 4120221.

It is an arithmetic number, because the mean of its divisors is an integer number (32369902950).

Almost surely, 2^787142781816 is an apocalyptic number.

787142781816 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

787142781816 is an abundant number, since it is smaller than the sum of its proper divisors (1284531006984).

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

787142781816 is a wasteful number, since it uses less digits than its factorization.

787142781816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204540 (or 204536 counting only the distinct ones).

The product of its digits is 8429568, while the sum is 60.

The spelling of 787142781816 in words is "seven hundred eighty-seven billion, one hundred forty-two million, seven hundred eighty-one thousand, eight hundred sixteen".