75126646121 has 4 divisors (see below), whose sum is σ = 75127868244. Its totient is φ = 75125424000.

The previous prime is 75126646103. The next prime is 75126646181. The reversal of 75126646121 is 12164662157.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 849139600 + 74277506521 = 29140^2 + 272539^2 .

It is a cyclic number.

It is not a de Polignac number, because 75126646121 - 2¹⁴ = 75126629737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75126646181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513680 + ... + 643521.

It is an arithmetic number, because the mean of its divisors is an integer number (18781967061).

Almost surely, 2^75126646121 is an apocalyptic number.

It is an amenable number.

75126646121 is a deficient number, since it is larger than the sum of its proper divisors (1222123).

75126646121 is a wasteful number, since it uses less digits than its factorization.

75126646121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222122.

The product of its digits is 120960, while the sum is 41.

The spelling of 75126646121 in words is "seventy-five billion, one hundred twenty-six million, six hundred forty-six thousand, one hundred twenty-one".