77446673856 has 252 divisors, whose sum is σ = 232014171480. Its totient is φ = 25647736320.

The previous prime is 77446673827. The next prime is 77446673873. The reversal of 77446673856 is 65837664477.

77446673856 is a `hidden beast` number, since 77 + 446 + 6 + 73 + 8 + 56 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 77446673793 and 77446673802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 76002115 + ... + 76003133.

Almost surely, 2^77446673856 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 77446673856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116007085740).

77446673856 is an abundant number, since it is smaller than the sum of its proper divisors (154567497624).

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

77446673856 is an equidigital number, since it uses as much as digits as its factorization.

77446673856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1205 counting only the distinct ones).

The product of its digits is 142248960, while the sum is 63.

The spelling of 77446673856 in words is "seventy-seven billion, four hundred forty-six million, six hundred seventy-three thousand, eight hundred fifty-six".