7525445257 has 16 divisors (see below), whose sum is σ = 8299678464. Its totient is φ = 6766578000.

The previous prime is 7525445201. The next prime is 7525445309.

7525445257 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7525445257 is a prime.

It is a super-2 number, since 2×7525445257² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7525445657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433882 + ... + 450892.

It is an arithmetic number, because the mean of its divisors is an integer number (518729904).

Almost surely, 2^7525445257 is an apocalyptic number.

It is an amenable number.

7525445257 is a deficient number, since it is larger than the sum of its proper divisors (774233207).

7525445257 is a wasteful number, since it uses less digits than its factorization.

7525445257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17460.

The product of its digits is 1960000, while the sum is 46.

The square root of 7525445257 is about 86749.3242452067. The cubic root of 7525445257 is about 1959.6449843774.

The spelling of 7525445257 in words is "seven billion, five hundred twenty-five million, four hundred forty-five thousand, two hundred fifty-seven".