77701522860 has 240 divisors, whose sum is σ = 264086577216. Its totient is φ = 19011138048.

The previous prime is 77701522841. The next prime is 77701522897. The reversal of 77701522860 is 6822510777.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3505974 + ... + 3528066.

Almost surely, 2^77701522860 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 77701522860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132043288608).

77701522860 is an abundant number, since it is smaller than the sum of its proper divisors (186385054356).

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

77701522860 is a wasteful number, since it uses less digits than its factorization.

77701522860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22294 (or 22283 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The spelling of 77701522860 in words is "seventy-seven billion, seven hundred one million, five hundred twenty-two thousand, eight hundred sixty".