877858505858778 has 16 divisors (see below), whose sum is σ = 1755899879972736. Its totient is φ = 292589023910400.

The previous prime is 877858505858771. The next prime is 877858505858783.

It is a happy number.

877858505858778 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (877858505858771) 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, 7619448226 + ... + 7619563437.

It is an arithmetic number, because the mean of its divisors is an integer number (109743742498296).

Almost surely, 2^{877858505858778} is an apocalyptic number.

877858505858778 is an abundant number, since it is smaller than the sum of its proper divisors (878041374113958).

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

877858505858778 is a wasteful number, since it uses less digits than its factorization.

877858505858778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15239021269.

The product of its (nonzero) digits is 393379840000, while the sum is 96.

The spelling of 877858505858778 in words is "eight hundred seventy-seven trillion, eight hundred fifty-eight billion, five hundred five million, eight hundred fifty-eight thousand, seven hundred seventy-eight".