77747351680670 has 128 divisors (see below), whose sum is σ = 177791529000960. Its totient is φ = 23864278078080.

The previous prime is 77747351680667. The next prime is 77747351680717. The reversal of 77747351680670 is 7608615374777.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77747351680670.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12771836 + ... + 17849775.

It is an arithmetic number, because the mean of its divisors is an integer number (1388996320320).

Almost surely, 2^{77747351680670} is an apocalyptic number.

77747351680670 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

77747351680670 is an abundant number, since it is smaller than the sum of its proper divisors (100044177320290).

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

77747351680670 is a wasteful number, since it uses less digits than its factorization.

77747351680670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30621750.

The product of its (nonzero) digits is 290424960, while the sum is 68.

The spelling of 77747351680670 in words is "seventy-seven trillion, seven hundred forty-seven billion, three hundred fifty-one million, six hundred eighty thousand, six hundred seventy".