245107681 has 32 divisors (see below), whose sum is σ = 314899200. Its totient is φ = 185552640.

The previous prime is 245107673. The next prime is 245107727. The reversal of 245107681 is 186701542.

245107681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245107681 - 2³ = 245107673 is a prime.

It is a super-2 number, since 2×245107681² = 120155550570395522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (245107661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345355 + ... + 346063.

It is an arithmetic number, because the mean of its divisors is an integer number (9840600).

Almost surely, 2^245107681 is an apocalyptic number.

It is an amenable number.

245107681 is a deficient number, since it is larger than the sum of its proper divisors (69791519).

245107681 is a wasteful number, since it uses less digits than its factorization.

245107681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 245107681 is about 15655.9152079973. The cubic root of 245107681 is about 625.8241339276.

The spelling of 245107681 in words is "two hundred forty-five million, one hundred seven thousand, six hundred eighty-one".