77750538432 has 112 divisors (see below), whose sum is σ = 235640148480. Its totient is φ = 22163668992.

The previous prime is 77750538427. The next prime is 77750538469. The reversal of 77750538432 is 23483505777.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524128 + ... + 655904.

Almost surely, 2^77750538432 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 77750538432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117820074240).

77750538432 is an abundant number, since it is smaller than the sum of its proper divisors (157889610048).

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

77750538432 is a wasteful number, since it uses less digits than its factorization.

77750538432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132238 (or 132228 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 51.

It can be divided in two parts, 7775053 and 8432, that added together give a triangular number (7783485 = T₃₉₄₅).

The spelling of 77750538432 in words is "seventy-seven billion, seven hundred fifty million, five hundred thirty-eight thousand, four hundred thirty-two".