245496681 has 12 divisors (see below), whose sum is σ = 357745908. Its totient is φ = 162215424.

The previous prime is 245496679. The next prime is 245496683. The reversal of 245496681 is 186694542.

245496681 is a `hidden beast` number, since 24 + 549 + 6 + 6 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (245496679) and next prime (245496683).

It can be written as a sum of positive squares in 2 ways, for example, as 110565225 + 134931456 = 10515^2 + 11616^2 .

It is not a de Polignac number, because 245496681 - 2¹ = 245496679 is a prime.

It is a super-2 number, since 2×245496681² = 120537240764031522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245496683) 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 in 11 ways as a sum of consecutive naturals, for example, 119680 + ... + 121713.

It is an arithmetic number, because the mean of its divisors is an integer number (29812159).

Almost surely, 2^245496681 is an apocalyptic number.

It is an amenable number.

245496681 is a deficient number, since it is larger than the sum of its proper divisors (112249227).

245496681 is a wasteful number, since it uses less digits than its factorization.

245496681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241512 (or 241509 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 245496681 is about 15668.3337020884. Note that the first 3 decimals coincide. The cubic root of 245496681 is about 626.1550319138.

The spelling of 245496681 in words is "two hundred forty-five million, four hundred ninety-six thousand, six hundred eighty-one".