78877801500764 has 72 divisors (see below), whose sum is σ = 167758180900128. Its totient is φ = 32295612961920.

The previous prime is 78877801500761. The next prime is 78877801500851. The reversal of 78877801500764 is 46700510877887.

It is a junction number, because it is equal to n+sod(n) for n = 78877801500694 and 78877801500703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78877801500761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6955019 + ... + 14357154.

It is an arithmetic number, because the mean of its divisors is an integer number (2329974734724).

Almost surely, 2^{78877801500764} is an apocalyptic number.

It is an amenable number.

78877801500764 is an abundant number, since it is smaller than the sum of its proper divisors (88880379399364).

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

78877801500764 is a wasteful number, since it uses less digits than its factorization.

78877801500764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21313035 (or 21313026 counting only the distinct ones).

The product of its (nonzero) digits is 147517440, while the sum is 68.

The spelling of 78877801500764 in words is "seventy-eight trillion, eight hundred seventy-seven billion, eight hundred one million, five hundred thousand, seven hundred sixty-four".