254917847551 has 4 divisors (see below), whose sum is σ = 269913015072. Its totient is φ = 239922680032.

The previous prime is 254917847543. The next prime is 254917847573. The reversal of 254917847551 is 155748719452.

It is a happy number.

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 254917847551 - 2³ = 254917847543 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254917841551) 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, 7497583735 + ... + 7497583768.

It is an arithmetic number, because the mean of its divisors is an integer number (67478253768).

Almost surely, 2^254917847551 is an apocalyptic number.

254917847551 is a deficient number, since it is larger than the sum of its proper divisors (14995167521).

254917847551 is a wasteful number, since it uses less digits than its factorization.

254917847551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14995167520.

The product of its digits is 14112000, while the sum is 58.

The spelling of 254917847551 in words is "two hundred fifty-four billion, nine hundred seventeen million, eight hundred forty-seven thousand, five hundred fifty-one".