84564257507 has 2 divisors, whose sum is σ = 84564257508. Its totient is φ = 84564257506.

The previous prime is 84564257489. The next prime is 84564257567. The reversal of 84564257507 is 70575246548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84564257507 - 2¹⁴ = 84564241123 is a prime.

It is a super-2 number, since 2×84564257507² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84564257567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42282128753 + 42282128754.

It is an arithmetic number, because the mean of its divisors is an integer number (42282128754).

Almost surely, 2^84564257507 is an apocalyptic number.

84564257507 is a deficient number, since it is larger than the sum of its proper divisors (1).

84564257507 is an equidigital number, since it uses as much as digits as its factorization.

84564257507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408000, while the sum is 53.

The spelling of 84564257507 in words is "eighty-four billion, five hundred sixty-four million, two hundred fifty-seven thousand, five hundred seven".