75477848729 has 2 divisors, whose sum is σ = 75477848730. Its totient is φ = 75477848728.

The previous prime is 75477848723. The next prime is 75477848749. The reversal of 75477848729 is 92784877457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64295209225 + 11182639504 = 253565^2 + 105748^2 .

It is a cyclic number.

It is not a de Polignac number, because 75477848729 - 2⁸ = 75477848473 is a prime.

It is not a weakly prime, because it can be changed into another prime (75477848723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37738924364 + 37738924365.

It is an arithmetic number, because the mean of its divisors is an integer number (37738924365).

Almost surely, 2^75477848729 is an apocalyptic number.

It is an amenable number.

75477848729 is a deficient number, since it is larger than the sum of its proper divisors (1).

75477848729 is an equidigital number, since it uses as much as digits as its factorization.

75477848729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221276160, while the sum is 68.

The spelling of 75477848729 in words is "seventy-five billion, four hundred seventy-seven million, eight hundred forty-eight thousand, seven hundred twenty-nine".