77221350000 has 600 divisors, whose sum is σ = 291856007520. Its totient is φ = 19673280000.

The previous prime is 77221349983. The next prime is 77221350043. The reversal of 77221350000 is 5312277.

It is a tau number, because it is divible by the number of its divisors (600).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 93149586 + ... + 93150414.

Almost surely, 2^77221350000 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 77221350000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145928003760).

77221350000 is an abundant number, since it is smaller than the sum of its proper divisors (214634657520).

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

77221350000 is an equidigital number, since it uses as much as digits as its factorization.

77221350000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

Adding to 77221350000 its reverse (5312277), we get a palindrome (77226662277).

The spelling of 77221350000 in words is "seventy-seven billion, two hundred twenty-one million, three hundred fifty thousand".