877646646778 has 16 divisors (see below), whose sum is σ = 1442158058880. Its totient is φ = 397261127200.

The previous prime is 877646646739. The next prime is 877646646781.

877646646778 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83452963 + ... + 83463478.

It is an arithmetic number, because the mean of its divisors is an integer number (90134878680).

Almost surely, 2^877646646778 is an apocalyptic number.

877646646778 is a deficient number, since it is larger than the sum of its proper divisors (564511412102).

877646646778 is a wasteful number, since it uses less digits than its factorization.

877646646778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166916693.

The product of its digits is 3186376704, while the sum is 76.

The spelling of 877646646778 in words is "eight hundred seventy-seven billion, six hundred forty-six million, six hundred forty-six thousand, seven hundred seventy-eight".