781258855104 has 896 divisors, whose sum is σ = 2965983928320. Its totient is φ = 196143316992.

The previous prime is 781258855103. The next prime is 781258855121. The reversal of 781258855104 is 401558852187.

It is a happy number.

781258855104 is a `hidden beast` number, since 7 + 8 + 1 + 2 + 5 + 88 + 551 + 0 + 4 = 666.

It is a super-2 number, since 2×781258855104² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (781258855103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 273452844 + ... + 273455700.

It is an arithmetic number, because the mean of its divisors is an integer number (3310249920).

Almost surely, 2^781258855104 is an apocalyptic number.

781258855104 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781258855104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1482991964160).

781258855104 is an abundant number, since it is smaller than the sum of its proper divisors (2184725073216).

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

781258855104 is a wasteful number, since it uses less digits than its factorization.

781258855104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2982 (or 2966 counting only the distinct ones).

The product of its (nonzero) digits is 3584000, while the sum is 54.

The spelling of 781258855104 in words is "seven hundred eighty-one billion, two hundred fifty-eight million, eight hundred fifty-five thousand, one hundred four".