77101398528 has 640 divisors, whose sum is σ = 280123785216. Its totient is φ = 18225561600.

The previous prime is 77101398503. The next prime is 77101398529. The reversal of 77101398528 is 82589310177.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (77101398529) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62328726 + ... + 62329962.

Almost surely, 2^77101398528 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 77101398528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140061892608).

77101398528 is an abundant number, since it is smaller than the sum of its proper divisors (203022386688).

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

77101398528 is a wasteful number, since it uses less digits than its factorization.

77101398528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324 (or 1308 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 51.

The spelling of 77101398528 in words is "seventy-seven billion, one hundred one million, three hundred ninety-eight thousand, five hundred twenty-eight".