245618681 has 16 divisors (see below), whose sum is σ = 322344960. Its totient is φ = 181316880.

The previous prime is 245618671. The next prime is 245618687. The reversal of 245618681 is 186816542.

It is a cyclic number.

It is not a de Polignac number, because 245618681 - 2²² = 241424377 is a prime.

It is a super-2 number, since 2×245618681² = 120657072912359522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245618687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82481 + ... + 85406.

It is an arithmetic number, because the mean of its divisors is an integer number (20146560).

Almost surely, 2^245618681 is an apocalyptic number.

It is an amenable number.

245618681 is a deficient number, since it is larger than the sum of its proper divisors (76726279).

245618681 is a wasteful number, since it uses less digits than its factorization.

245618681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167924.

The product of its digits is 92160, while the sum is 41.

The square root of 245618681 is about 15672.2264212842. The cubic root of 245618681 is about 626.2587376786.

The spelling of 245618681 in words is "two hundred forty-five million, six hundred eighteen thousand, six hundred eighty-one".