77821349000 has 32 divisors (see below), whose sum is σ = 182101959000. Its totient is φ = 31128539200.

The previous prime is 77821348963. The next prime is 77821349029. The reversal of 77821349000 is 94312877.

It can be written as a sum of positive squares in 4 ways, for example, as 7440442564 + 70380906436 = 86258^2 + 265294^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38909675 + ... + 38911674.

Almost surely, 2^77821349000 is an apocalyptic number.

It is an amenable number.

77821349000 is an abundant number, since it is smaller than the sum of its proper divisors (104280610000).

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

77821349000 is a wasteful number, since it uses less digits than its factorization.

77821349000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77821370 (or 77821356 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 77821349000 in words is "seventy-seven billion, eight hundred twenty-one million, three hundred forty-nine thousand".