75138466577 has 2 divisors, whose sum is σ = 75138466578. Its totient is φ = 75138466576.

The previous prime is 75138466439. The next prime is 75138466591. The reversal of 75138466577 is 77566483157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70227120016 + 4911346561 = 265004^2 + 70081^2 .

It is a cyclic number.

It is not a de Polignac number, because 75138466577 - 2⁸ = 75138466321 is a prime.

It is not a weakly prime, because it can be changed into another prime (75138469577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37569233288 + 37569233289.

It is an arithmetic number, because the mean of its divisors is an integer number (37569233289).

Almost surely, 2^75138466577 is an apocalyptic number.

It is an amenable number.

75138466577 is a deficient number, since it is larger than the sum of its proper divisors (1).

75138466577 is an equidigital number, since it uses as much as digits as its factorization.

75138466577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29635200, while the sum is 59.

The spelling of 75138466577 in words is "seventy-five billion, one hundred thirty-eight million, four hundred sixty-six thousand, five hundred seventy-seven".