75587879557 has 2 divisors, whose sum is σ = 75587879558. Its totient is φ = 75587879556.

The previous prime is 75587879537. The next prime is 75587879561. The reversal of 75587879557 is 75597878557.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52507889316 + 23079990241 = 229146^2 + 151921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75587879557 is a prime.

It is the 274933-rd Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 75587879557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75587879537) by changing a digit.

It is a nontrivial repunit in base 274932.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37793939778 + 37793939779.

It is an arithmetic number, because the mean of its divisors is an integer number (37793939779).

Almost surely, 2^75587879557 is an apocalyptic number.

It is an amenable number.

75587879557 is a deficient number, since it is larger than the sum of its proper divisors (1).

75587879557 is an equidigital number, since it uses as much as digits as its factorization.

75587879557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360000, while the sum is 73.

The spelling of 75587879557 in words is "seventy-five billion, five hundred eighty-seven million, eight hundred seventy-nine thousand, five hundred fifty-seven".