77863954078 has 8 divisors (see below), whose sum is σ = 119280951072. Its totient is φ = 38103637056.

The previous prime is 77863954073. The next prime is 77863954087. The reversal of 77863954078 is 87045936877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77863954073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414169875 + ... + 414170062.

It is an arithmetic number, because the mean of its divisors is an integer number (14910118884).

Almost surely, 2^77863954078 is an apocalyptic number.

77863954078 is a deficient number, since it is larger than the sum of its proper divisors (41416996994).

77863954078 is a wasteful number, since it uses less digits than its factorization.

77863954078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828339986.

The product of its (nonzero) digits is 71124480, while the sum is 64.

The spelling of 77863954078 in words is "seventy-seven billion, eight hundred sixty-three million, nine hundred fifty-four thousand, seventy-eight".