77678171486476 has 24 divisors (see below), whose sum is σ = 150508044622656. Its totient is φ = 34781270813520.

The previous prime is 77678171486467. The next prime is 77678171486477. The reversal of 77678171486476 is 67468417187677.

It is a junction number, because it is equal to n+sod(n) for n = 77678171486396 and 77678171486405.

It is not an unprimeable number, because it can be changed into a prime (77678171486477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13174720846 + ... + 13174726741.

It is an arithmetic number, because the mean of its divisors is an integer number (6271168525944).

Almost surely, 2^{77678171486476} is an apocalyptic number.

It is an amenable number.

77678171486476 is a deficient number, since it is larger than the sum of its proper divisors (72829873136180).

77678171486476 is a wasteful number, since it uses less digits than its factorization.

77678171486476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26349447669 (or 26349447667 counting only the distinct ones).

The product of its digits is 3717439488, while the sum is 79.

The spelling of 77678171486476 in words is "seventy-seven trillion, six hundred seventy-eight billion, one hundred seventy-one million, four hundred eighty-six thousand, four hundred seventy-six".