75357505072021 has 2 divisors, whose sum is σ = 75357505072022. Its totient is φ = 75357505072020.

The previous prime is 75357505071941. The next prime is 75357505072033. The reversal of 75357505072021 is 12027050575357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68274508339921 + 7082996732100 = 8262839^2 + 2661390^2 .

It is a cyclic number.

It is not a de Polignac number, because 75357505072021 - 2¹³ = 75357505063829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75357505073021) 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 as a sum of consecutive naturals, namely, 37678752536010 + 37678752536011.

It is an arithmetic number, because the mean of its divisors is an integer number (37678752536011).

Almost surely, 2^{75357505072021} is an apocalyptic number.

It is an amenable number.

75357505072021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75357505072021 is an equidigital number, since it uses as much as digits as its factorization.

75357505072021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2572500, while the sum is 49.

The spelling of 75357505072021 in words is "seventy-five trillion, three hundred fifty-seven billion, five hundred five million, seventy-two thousand, twenty-one".