254622306640 has 80 divisors (see below), whose sum is σ = 637984947600. Its totient is φ = 93948051456.

The previous prime is 254622306629. The next prime is 254622306649. The reversal of 254622306640 is 46603226452.

It can be written as a sum of positive squares in 8 ways, for example, as 60888523536 + 193733783104 = 246756^2 + 440152^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 254622306593 and 254622306602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254622306649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1400496 + ... + 1571824.

It is an arithmetic number, because the mean of its divisors is an integer number (7974811845).

Almost surely, 2^254622306640 is an apocalyptic number.

254622306640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 254622306640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318992473800).

254622306640 is an abundant number, since it is smaller than the sum of its proper divisors (383362640960).

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

254622306640 is a wasteful number, since it uses less digits than its factorization.

254622306640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172784 (or 172778 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 254622306640 in words is "two hundred fifty-four billion, six hundred twenty-two million, three hundred six thousand, six hundred forty".