77303630550 has 192 divisors, whose sum is σ = 199118684160. Its totient is φ = 19835088000.

The previous prime is 77303630519. The next prime is 77303630561. The reversal of 77303630550 is 5503630377.

It is a junction number, because it is equal to n+sod(n) for n = 77303630499 and 77303630508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 161385211 + ... + 161385689.

It is an arithmetic number, because the mean of its divisors is an integer number (1037076480).

Almost surely, 2^77303630550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77303630550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99559342080).

77303630550 is an abundant number, since it is smaller than the sum of its proper divisors (121815053610).

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

77303630550 is a wasteful number, since it uses less digits than its factorization.

77303630550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 39.

The spelling of 77303630550 in words is "seventy-seven billion, three hundred three million, six hundred thirty thousand, five hundred fifty".