77853034878 has 16 divisors (see below), whose sum is σ = 157899113856. Its totient is φ = 25585504280.

The previous prime is 77853034837. The next prime is 77853034927. The reversal of 77853034878 is 87843035877.

It is a super-2 number, since 2×77853034878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 91376376 + ... + 91377227.

It is an arithmetic number, because the mean of its divisors is an integer number (9868694616).

Almost surely, 2^77853034878 is an apocalyptic number.

77853034878 is an abundant number, since it is smaller than the sum of its proper divisors (80046078978).

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

77853034878 is a wasteful number, since it uses less digits than its factorization.

77853034878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182753679.

The product of its (nonzero) digits is 31610880, while the sum is 60.

Subtracting 77853034878 from its reverse (87843035877), we obtain a palindrome (9990000999).

The spelling of 77853034878 in words is "seventy-seven billion, eight hundred fifty-three million, thirty-four thousand, eight hundred seventy-eight".