6521151673 has 2 divisors, whose sum is σ = 6521151674. Its totient is φ = 6521151672.

The previous prime is 6521151653. The next prime is 6521151683. The reversal of 6521151673 is 3761511256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3815903529 + 2705248144 = 61773^2 + 52012^2 .

It is a cyclic number.

It is not a de Polignac number, because 6521151673 - 2¹³ = 6521143481 is a prime.

It is not a weakly prime, because it can be changed into another prime (6521151653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260575836 + 3260575837.

It is an arithmetic number, because the mean of its divisors is an integer number (3260575837).

Almost surely, 2^6521151673 is an apocalyptic number.

It is an amenable number.

6521151673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6521151673 is an equidigital number, since it uses as much as digits as its factorization.

6521151673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 37.

The square root of 6521151673 is about 80753.6480476269. The cubic root of 6521151673 is about 1868.2777162041.

The spelling of 6521151673 in words is "six billion, five hundred twenty-one million, one hundred fifty-one thousand, six hundred seventy-three".