75727444477 has 2 divisors, whose sum is σ = 75727444478. Its totient is φ = 75727444476.

The previous prime is 75727444439. The next prime is 75727444483. The reversal of 75727444477 is 77444472757.

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., 74801703001 + 925741476 = 273499^2 + 30426^2 .

It is a cyclic number.

It is not a de Polignac number, because 75727444477 - 2⁷ = 75727444349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75727445477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37863722238 + 37863722239.

It is an arithmetic number, because the mean of its divisors is an integer number (37863722239).

Almost surely, 2^75727444477 is an apocalyptic number.

It is an amenable number.

75727444477 is a deficient number, since it is larger than the sum of its proper divisors (1).

75727444477 is an equidigital number, since it uses as much as digits as its factorization.

75727444477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43025920, while the sum is 58.

The spelling of 75727444477 in words is "seventy-five billion, seven hundred twenty-seven million, four hundred forty-four thousand, four hundred seventy-seven".