254623462661 has 4 divisors (see below), whose sum is σ = 255614215692. Its totient is φ = 253632709632.

The previous prime is 254623462651. The next prime is 254623462693. The reversal of 254623462661 is 166264326452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130512400225 + 124111062436 = 361265^2 + 352294^2 .

It is a cyclic number.

It is not a de Polignac number, because 254623462661 - 2²⁶ = 254556353797 is a prime.

It is a super-2 number, since 2×254623462661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254623462651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495376130 + ... + 495376643.

It is an arithmetic number, because the mean of its divisors is an integer number (63903553923).

Almost surely, 2^254623462661 is an apocalyptic number.

It is an amenable number.

254623462661 is a deficient number, since it is larger than the sum of its proper divisors (990753031).

254623462661 is an equidigital number, since it uses as much as digits as its factorization.

254623462661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990753030.

The product of its digits is 2488320, while the sum is 47.

The spelling of 254623462661 in words is "two hundred fifty-four billion, six hundred twenty-three million, four hundred sixty-two thousand, six hundred sixty-one".