75764620121 has 2 divisors, whose sum is σ = 75764620122. Its totient is φ = 75764620120.

The previous prime is 75764620111. The next prime is 75764620159. The reversal of 75764620121 is 12102646757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67685306896 + 8079313225 = 260164^2 + 89885^2 .

It is a cyclic number.

It is not a de Polignac number, because 75764620121 - 2²² = 75760425817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (75764620111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37882310060 + 37882310061.

It is an arithmetic number, because the mean of its divisors is an integer number (37882310061).

Almost surely, 2^75764620121 is an apocalyptic number.

It is an amenable number.

75764620121 is a deficient number, since it is larger than the sum of its proper divisors (1).

75764620121 is an equidigital number, since it uses as much as digits as its factorization.

75764620121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 75764620121 in words is "seventy-five billion, seven hundred sixty-four million, six hundred twenty thousand, one hundred twenty-one".