778718627072 has 72 divisors (see below), whose sum is σ = 1606222555392. Its totient is φ = 376795645440.

The previous prime is 778718627047. The next prime is 778718627111. The reversal of 778718627072 is 270726817877.

It is a super-2 number, since 2×778718627072² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 778718626996 and 778718627014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7575443 + ... + 7677549.

Almost surely, 2^778718627072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778718627072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803111277696).

778718627072 is an abundant number, since it is smaller than the sum of its proper divisors (827503928320).

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

778718627072 is an frugal number, since it uses more digits than its factorization.

778718627072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102216 (or 102140 counting only the distinct ones).

The product of its (nonzero) digits is 25815552, while the sum is 62.

The spelling of 778718627072 in words is "seven hundred seventy-eight billion, seven hundred eighteen million, six hundred twenty-seven thousand, seventy-two".