45257561117 has 2 divisors, whose sum is σ = 45257561118. Its totient is φ = 45257561116.

The previous prime is 45257561077. The next prime is 45257561171. The reversal of 45257561117 is 71116575254.

Together with next prime (45257561171) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44797415716 + 460145401 = 211654^2 + 21451^2 .

It is a cyclic number.

It is not a de Polignac number, because 45257561117 - 2²² = 45253366813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45257569117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22628780558 + 22628780559.

It is an arithmetic number, because the mean of its divisors is an integer number (22628780559).

Almost surely, 2^45257561117 is an apocalyptic number.

It is an amenable number.

45257561117 is a deficient number, since it is larger than the sum of its proper divisors (1).

45257561117 is an equidigital number, since it uses as much as digits as its factorization.

45257561117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294000, while the sum is 44.

The spelling of 45257561117 in words is "forty-five billion, two hundred fifty-seven million, five hundred sixty-one thousand, one hundred seventeen".