75781428192 has 144 divisors (see below), whose sum is σ = 226308569760. Its totient is φ = 24007965696.

The previous prime is 75781428181. The next prime is 75781428221. The reversal of 75781428192 is 29182418757.

75781428192 is a `hidden beast` number, since 7 + 57 + 81 + 428 + 1 + 92 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1003534 + ... + 1076402.

It is an arithmetic number, because the mean of its divisors is an integer number (1571587290).

Almost surely, 2^75781428192 is an apocalyptic number.

75781428192 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75781428192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113154284880).

75781428192 is an abundant number, since it is smaller than the sum of its proper divisors (150527141568).

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

75781428192 is a wasteful number, since it uses less digits than its factorization.

75781428192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73065 (or 73054 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The spelling of 75781428192 in words is "seventy-five billion, seven hundred eighty-one million, four hundred twenty-eight thousand, one hundred ninety-two".