254256204678 has 64 divisors (see below), whose sum is σ = 616156927488. Its totient is φ = 68280952320.

The previous prime is 254256204673. The next prime is 254256204707. The reversal of 254256204678 is 876402652452.

It is a super-2 number, since 2×254256204678² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 254256204678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254256204673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 305293 + ... + 775703.

It is an arithmetic number, because the mean of its divisors is an integer number (9627451992).

Almost surely, 2^254256204678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 254256204678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308078463744).

254256204678 is an abundant number, since it is smaller than the sum of its proper divisors (361900722810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

254256204678 is a wasteful number, since it uses less digits than its factorization.

254256204678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471197.

The product of its (nonzero) digits is 6451200, while the sum is 51.

The spelling of 254256204678 in words is "two hundred fifty-four billion, two hundred fifty-six million, two hundred four thousand, six hundred seventy-eight".