253555250440 has 32 divisors (see below), whose sum is σ = 571421016000. Its totient is φ = 101258241984.

The previous prime is 253555250411. The next prime is 253555250449. The reversal of 253555250440 is 44052555352.

It is a super-2 number, since 2×253555250440² (a number of 24 digits) contains 22 as substring.

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 = 253555250393 and 253555250402.

It is not an unprimeable number, because it can be changed into a prime (253555250449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5095500 + ... + 5145019.

It is an arithmetic number, because the mean of its divisors is an integer number (17856906750).

Almost surely, 2^253555250440 is an apocalyptic number.

253555250440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253555250440 is an abundant number, since it is smaller than the sum of its proper divisors (317865765560).

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

253555250440 is a wasteful number, since it uses less digits than its factorization.

253555250440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10241149 (or 10241145 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 40.

The spelling of 253555250440 in words is "two hundred fifty-three billion, five hundred fifty-five million, two hundred fifty thousand, four hundred forty".