77544322650 has 192 divisors, whose sum is σ = 217362456960. Its totient is φ = 20323353600.

The previous prime is 77544322643. The next prime is 77544322651. The reversal of 77544322650 is 5622344577.

77544322650 is a `hidden beast` number, since 7 + 7 + 544 + 32 + 26 + 50 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 77544322596 and 77544322605.

It is not an unprimeable number, because it can be changed into a prime (77544322651) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 59786802 + ... + 59788098.

It is an arithmetic number, because the mean of its divisors is an integer number (1132096130).

Almost surely, 2^77544322650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77544322650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108681228480).

77544322650 is an abundant number, since it is smaller than the sum of its proper divisors (139818134310).

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

77544322650 is a wasteful number, since it uses less digits than its factorization.

77544322650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046 (or 2035 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 45.

The spelling of 77544322650 in words is "seventy-seven billion, five hundred forty-four million, three hundred twenty-two thousand, six hundred fifty".