75925870621 has 2 divisors, whose sum is σ = 75925870622. Its totient is φ = 75925870620.

The previous prime is 75925870511. The next prime is 75925870633. The reversal of 75925870621 is 12607852957.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55690808121 + 20235062500 = 235989^2 + 142250^2 .

It is a cyclic number.

It is not a de Polignac number, because 75925870621 - 2¹³ = 75925862429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75925870681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37962935310 + 37962935311.

It is an arithmetic number, because the mean of its divisors is an integer number (37962935311).

Almost surely, 2^75925870621 is an apocalyptic number.

It is an amenable number.

75925870621 is a deficient number, since it is larger than the sum of its proper divisors (1).

75925870621 is an equidigital number, since it uses as much as digits as its factorization.

75925870621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 75925870621 in words is "seventy-five billion, nine hundred twenty-five million, eight hundred seventy thousand, six hundred twenty-one".