77964171000 has 128 divisors (see below), whose sum is σ = 243382052160. Its totient is φ = 20779008000.

The previous prime is 77964170987. The next prime is 77964171001. The reversal of 77964171000 is 17146977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77964171001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6404920 + ... + 6417080.

Almost surely, 2^77964171000 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 77964171000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121691026080).

77964171000 is an abundant number, since it is smaller than the sum of its proper divisors (165417881160).

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

77964171000 is a wasteful number, since it uses less digits than its factorization.

77964171000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322 (or 14308 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 42.

The spelling of 77964171000 in words is "seventy-seven billion, nine hundred sixty-four million, one hundred seventy-one thousand".