77370680478 has 64 divisors (see below), whose sum is σ = 190906007040. Its totient is φ = 20356693632.

The previous prime is 77370680417. The next prime is 77370680489. The reversal of 77370680478 is 87408607377.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 59676 + ... + 397872.

It is an arithmetic number, because the mean of its divisors is an integer number (2982906360).

Almost surely, 2^77370680478 is an apocalyptic number.

77370680478 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 77370680478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95453003520).

77370680478 is an abundant number, since it is smaller than the sum of its proper divisors (113535326562).

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

77370680478 is a wasteful number, since it uses less digits than its factorization.

77370680478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338641.

The product of its (nonzero) digits is 11063808, while the sum is 57.

The spelling of 77370680478 in words is "seventy-seven billion, three hundred seventy million, six hundred eighty thousand, four hundred seventy-eight".