75751621073 has 2 divisors, whose sum is σ = 75751621074. Its totient is φ = 75751621072.

The previous prime is 75751621069. The next prime is 75751621171. The reversal of 75751621073 is 37012615757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73781770384 + 1969850689 = 271628^2 + 44383^2 .

It is a cyclic number.

It is not a de Polignac number, because 75751621073 - 2² = 75751621069 is a prime.

It is not a weakly prime, because it can be changed into another prime (75751621013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37875810536 + 37875810537.

It is an arithmetic number, because the mean of its divisors is an integer number (37875810537).

Almost surely, 2^75751621073 is an apocalyptic number.

It is an amenable number.

75751621073 is a deficient number, since it is larger than the sum of its proper divisors (1).

75751621073 is an equidigital number, since it uses as much as digits as its factorization.

75751621073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 308700, while the sum is 44.

The spelling of 75751621073 in words is "seventy-five billion, seven hundred fifty-one million, six hundred twenty-one thousand, seventy-three".