245654661 has 16 divisors (see below), whose sum is σ = 376848000. Its totient is φ = 139430208.

The previous prime is 245654653. The next prime is 245654663. The reversal of 245654661 is 166456542.

It is not a de Polignac number, because 245654661 - 2³ = 245654653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245654663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36126 + ... + 42383.

It is an arithmetic number, because the mean of its divisors is an integer number (23553000).

Almost surely, 2^245654661 is an apocalyptic number.

245654661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

245654661 is a deficient number, since it is larger than the sum of its proper divisors (131193339).

245654661 is a wasteful number, since it uses less digits than its factorization.

245654661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78668.

The product of its digits is 172800, while the sum is 39.

The square root of 245654661 is about 15673.3742697608. The cubic root of 245654661 is about 626.2893158213.

The spelling of 245654661 in words is "two hundred forty-five million, six hundred fifty-four thousand, six hundred sixty-one".