254345661 has 24 divisors (see below), whose sum is σ = 389665536. Its totient is φ = 159524640.

The previous prime is 254345657. The next prime is 254345677. The reversal of 254345661 is 166543452.

254345661 is a `hidden beast` number, since 2 + 543 + 4 + 56 + 61 = 666.

254345661 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 254345661 - 2² = 254345657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254345621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2556 + ... + 22698.

It is an arithmetic number, because the mean of its divisors is an integer number (16236064).

Almost surely, 2^254345661 is an apocalyptic number.

It is an amenable number.

254345661 is a deficient number, since it is larger than the sum of its proper divisors (135319875).

254345661 is a wasteful number, since it uses less digits than its factorization.

254345661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20233 (or 20230 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 254345661 is about 15948.2181136326. The cubic root of 254345661 is about 633.5897037492.

The spelling of 254345661 in words is "two hundred fifty-four million, three hundred forty-five thousand, six hundred sixty-one".