254621623145 has 4 divisors (see below), whose sum is σ = 305545947780. Its totient is φ = 203697298512.

The previous prime is 254621623141. The next prime is 254621623177. The reversal of 254621623145 is 541326126452.

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 193800691984 + 60820931161 = 440228^2 + 246619^2 .

It is a cyclic number.

It is not a de Polignac number, because 254621623145 - 2² = 254621623141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (254621623141) 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, 25462162310 + ... + 25462162319.

It is an arithmetic number, because the mean of its divisors is an integer number (76386486945).

Almost surely, 2^254621623145 is an apocalyptic number.

It is an amenable number.

254621623145 is a deficient number, since it is larger than the sum of its proper divisors (50924324635).

254621623145 is an equidigital number, since it uses as much as digits as its factorization.

254621623145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50924324634.

The product of its digits is 345600, while the sum is 41.

Adding to 254621623145 its reverse (541326126452), we get a palindrome (795947749597).

The spelling of 254621623145 in words is "two hundred fifty-four billion, six hundred twenty-one million, six hundred twenty-three thousand, one hundred forty-five".