253999445400 has 144 divisors (see below), whose sum is σ = 854987438760. Its totient is φ = 67576550400.

The previous prime is 253999445341. The next prime is 253999445437. The reversal of 253999445400 is 4544999352.

253999445400 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 9 + 94 + 4 + 540 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 616455 + ... + 942345.

Almost surely, 2^253999445400 is an apocalyptic number.

253999445400 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 253999445400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427493719380).

253999445400 is an abundant number, since it is smaller than the sum of its proper divisors (600987993360).

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

253999445400 is a wasteful number, since it uses less digits than its factorization.

253999445400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326346 (or 326334 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 253999445400 in words is "two hundred fifty-three billion, nine hundred ninety-nine million, four hundred forty-five thousand, four hundred".