6521257045 has 32 divisors (see below), whose sum is σ = 8633721600. Its totient is φ = 4706532864.

The previous prime is 6521257027. The next prime is 6521257049. The reversal of 6521257045 is 5407521256.

It is not a de Polignac number, because 6521257045 - 2¹¹ = 6521254997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6521256995 and 6521257013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521257049) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 493849 + ... + 506881.

It is an arithmetic number, because the mean of its divisors is an integer number (269803800).

Almost surely, 2^6521257045 is an apocalyptic number.

It is an amenable number.

6521257045 is a deficient number, since it is larger than the sum of its proper divisors (2112464555).

6521257045 is a wasteful number, since it uses less digits than its factorization.

6521257045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13309.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 6521257045 is about 80754.3004737209. The cubic root of 6521257045 is about 1868.2877790022.

The spelling of 6521257045 in words is "six billion, five hundred twenty-one million, two hundred fifty-seven thousand, forty-five".