75735121064 has 8 divisors (see below), whose sum is σ = 142003352010. Its totient is φ = 37867560528.

The previous prime is 75735121009. The next prime is 75735121067. The reversal of 75735121064 is 46012153757.

It can be written as a sum of positive squares in only one way, i.e., 65608724164 + 10126396900 = 256142^2 + 100630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (75735121067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4733445059 + ... + 4733445074.

Almost surely, 2^75735121064 is an apocalyptic number.

It is an amenable number.

75735121064 is a deficient number, since it is larger than the sum of its proper divisors (66268230946).

75735121064 is a wasteful number, since it uses less digits than its factorization.

75735121064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9466890139 (or 9466890135 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 41.

The spelling of 75735121064 in words is "seventy-five billion, seven hundred thirty-five million, one hundred twenty-one thousand, sixty-four".