77513456532 has 96 divisors (see below), whose sum is σ = 193633026048. Its totient is φ = 24075241344.

The previous prime is 77513456477. The next prime is 77513456539. The reversal of 77513456532 is 23565431577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77513456539) 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, 4536918 + ... + 4553970.

It is an arithmetic number, because the mean of its divisors is an integer number (2017010688).

Almost surely, 2^77513456532 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 77513456532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96816513024).

77513456532 is an abundant number, since it is smaller than the sum of its proper divisors (116119569516).

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

77513456532 is a wasteful number, since it uses less digits than its factorization.

77513456532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17509 (or 17507 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 48.

The spelling of 77513456532 in words is "seventy-seven billion, five hundred thirteen million, four hundred fifty-six thousand, five hundred thirty-two".