254541564643 has 4 divisors (see below), whose sum is σ = 259344235728. Its totient is φ = 249738893560.

The previous prime is 254541564631. The next prime is 254541564679. The reversal of 254541564643 is 346465145452.

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

It is a cyclic number.

It is not a de Polignac number, because 254541564643 - 2²¹ = 254539467491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (254541564143) 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, 2401335463 + ... + 2401335568.

It is an arithmetic number, because the mean of its divisors is an integer number (64836058932).

Almost surely, 2^254541564643 is an apocalyptic number.

254541564643 is a deficient number, since it is larger than the sum of its proper divisors (4802671085).

254541564643 is an equidigital number, since it uses as much as digits as its factorization.

254541564643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802671084.

The product of its digits is 6912000, while the sum is 49.

The spelling of 254541564643 in words is "two hundred fifty-four billion, five hundred forty-one million, five hundred sixty-four thousand, six hundred forty-three".