75051359021 has 4 divisors (see below), whose sum is σ = 75373468092. Its totient is φ = 74729249952.

The previous prime is 75051358961. The next prime is 75051359023. The reversal of 75051359021 is 12095315057.

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 7261425796 + 67789933225 = 85214^2 + 260365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75051359021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75051359023) 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, 161054186 + ... + 161054651.

It is an arithmetic number, because the mean of its divisors is an integer number (18843367023).

Almost surely, 2^75051359021 is an apocalyptic number.

It is an amenable number.

75051359021 is a deficient number, since it is larger than the sum of its proper divisors (322109071).

75051359021 is a wasteful number, since it uses less digits than its factorization.

75051359021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322109070.

The product of its (nonzero) digits is 47250, while the sum is 38.

The spelling of 75051359021 in words is "seventy-five billion, fifty-one million, three hundred fifty-nine thousand, twenty-one".