75056726021 has 2 divisors, whose sum is σ = 75056726022. Its totient is φ = 75056726020.

The previous prime is 75056725969. The next prime is 75056726023. The reversal of 75056726021 is 12062765057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63357924100 + 11698801921 = 251710^2 + 108161^2 .

It is a cyclic number.

It is not a de Polignac number, because 75056726021 - 2¹⁰ = 75056724997 is a prime.

Together with 75056726023, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75056726021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75056726023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37528363010 + 37528363011.

It is an arithmetic number, because the mean of its divisors is an integer number (37528363011).

Almost surely, 2^75056726021 is an apocalyptic number.

It is an amenable number.

75056726021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75056726021 is an equidigital number, since it uses as much as digits as its factorization.

75056726021 is an evil number, because the sum of its binary digits is even.

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

The spelling of 75056726021 in words is "seventy-five billion, fifty-six million, seven hundred twenty-six thousand, twenty-one".