75121733380 has 24 divisors (see below), whose sum is σ = 159528179160. Its totient is φ = 29711066880.

The previous prime is 75121733327. The next prime is 75121733387. The reversal of 75121733380 is 8333712157.

It can be written as a sum of positive squares in 4 ways, for example, as 17318033604 + 57803699776 = 131598^2 + 240424^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (75121733387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21099831 + ... + 21103390.

It is an arithmetic number, because the mean of its divisors is an integer number (6647007465).

Almost surely, 2^75121733380 is an apocalyptic number.

It is an amenable number.

75121733380 is an abundant number, since it is smaller than the sum of its proper divisors (84406445780).

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

75121733380 is a wasteful number, since it uses less digits than its factorization.

75121733380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42203319 (or 42203317 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 75121733380 in words is "seventy-five billion, one hundred twenty-one million, seven hundred thirty-three thousand, three hundred eighty".