75451447242 has 64 divisors (see below), whose sum is σ = 177934527360. Its totient is φ = 23617481472.

The previous prime is 75451447177. The next prime is 75451447249. The reversal of 75451447242 is 24274415457.

75451447242 is a `hidden beast` number, since 7 + 54 + 514 + 47 + 2 + 42 = 666.

It is not an unprimeable number, because it can be changed into a prime (75451447249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313908 + ... + 499440.

It is an arithmetic number, because the mean of its divisors is an integer number (2780226990).

Almost surely, 2^75451447242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75451447242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88967263680).

75451447242 is an abundant number, since it is smaller than the sum of its proper divisors (102483080118).

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

75451447242 is a wasteful number, since it uses less digits than its factorization.

75451447242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186004 (or 185998 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 45.

The spelling of 75451447242 in words is "seventy-five billion, four hundred fifty-one million, four hundred forty-seven thousand, two hundred forty-two".