77863265280 has 616 divisors, whose sum is σ = 292540732992. Its totient is φ = 19838877696.

The previous prime is 77863265269. The next prime is 77863265317. The reversal of 77863265280 is 8256236877.

77863265280 is a `hidden beast` number, since 7 + 7 + 86 + 32 + 6 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 85846587 + ... + 85847493.

Almost surely, 2^77863265280 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 77863265280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146270366496).

77863265280 is an abundant number, since it is smaller than the sum of its proper divisors (214677467712).

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

77863265280 is an equidigital number, since it uses as much as digits as its factorization.

77863265280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 77863265280 in words is "seventy-seven billion, eight hundred sixty-three million, two hundred sixty-five thousand, two hundred eighty".