78777503298648 has 288 divisors, whose sum is σ = 271489787112960. Its totient is φ = 20405931557760.

The previous prime is 78777503298643. The next prime is 78777503298691. The reversal of 78777503298648 is 84689230577787.

78777503298648 is a `hidden beast` number, since 7 + 8 + 7 + 7 + 7 + 503 + 29 + 86 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78777503298643) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11476965 + ... + 17008107.

It is an arithmetic number, because the mean of its divisors is an integer number (942672871920).

Almost surely, 2^{78777503298648} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78777503298648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135744893556480).

78777503298648 is an abundant number, since it is smaller than the sum of its proper divisors (192712283814312).

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

78777503298648 is a wasteful number, since it uses less digits than its factorization.

78777503298648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5531547 (or 5531533 counting only the distinct ones).

The product of its (nonzero) digits is 7965941760, while the sum is 81.

The spelling of 78777503298648 in words is "seventy-eight trillion, seven hundred seventy-seven billion, five hundred three million, two hundred ninety-eight thousand, six hundred forty-eight".