254720380640 has 96 divisors (see below), whose sum is σ = 659208987360. Its totient is φ = 92241100800.

The previous prime is 254720380639. The next prime is 254720380741. The reversal of 254720380640 is 46083027452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123896 + ... + 724424.

It is an arithmetic number, because the mean of its divisors is an integer number (6866760285).

Almost surely, 2^254720380640 is an apocalyptic number.

254720380640 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 254720380640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329604493680).

254720380640 is an abundant number, since it is smaller than the sum of its proper divisors (404488606720).

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

254720380640 is a wasteful number, since it uses less digits than its factorization.

254720380640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600796 (or 600788 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 254720380640 in words is "two hundred fifty-four billion, seven hundred twenty million, three hundred eighty thousand, six hundred forty".