75525252557 has 4 divisors (see below), whose sum is σ = 75525883356. Its totient is φ = 75524621760.

The previous prime is 75525252553. The next prime is 75525252563.

75525252557 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 42986143561 + 32539108996 = 207331^2 + 180386^2 .

It is a cyclic number.

It is not a de Polignac number, because 75525252557 - 2² = 75525252553 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75525252553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74444 + ... + 395717.

It is an arithmetic number, because the mean of its divisors is an integer number (18881470839).

Almost surely, 2^75525252557 is an apocalyptic number.

It is an amenable number.

75525252557 is a deficient number, since it is larger than the sum of its proper divisors (630799).

75525252557 is a wasteful number, since it uses less digits than its factorization.

75525252557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630798.

The product of its digits is 6125000, while the sum is 50.

The spelling of 75525252557 in words is "seventy-five billion, five hundred twenty-five million, two hundred fifty-two thousand, five hundred fifty-seven".