75621575940121 has 2 divisors, whose sum is σ = 75621575940122. Its totient is φ = 75621575940120.

The previous prime is 75621575940107. The next prime is 75621575940151. The reversal of 75621575940121 is 12104957512657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73957179226896 + 1664396713225 = 8599836^2 + 1290115^2 .

It is a cyclic number.

It is not a de Polignac number, because 75621575940121 - 2⁷ = 75621575939993 is a prime.

It is not a weakly prime, because it can be changed into another prime (75621575940151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37810787970060 + 37810787970061.

It is an arithmetic number, because the mean of its divisors is an integer number (37810787970061).

Almost surely, 2^{75621575940121} is an apocalyptic number.

It is an amenable number.

75621575940121 is a deficient number, since it is larger than the sum of its proper divisors (1).

75621575940121 is an equidigital number, since it uses as much as digits as its factorization.

75621575940121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292000, while the sum is 55.

The spelling of 75621575940121 in words is "seventy-five trillion, six hundred twenty-one billion, five hundred seventy-five million, nine hundred forty thousand, one hundred twenty-one".