253533036440 has 64 divisors (see below), whose sum is σ = 577763841600. Its totient is φ = 100119587328.

The previous prime is 253533036403. The next prime is 253533036469. The reversal of 253533036440 is 44630335352.

It is a junction number, because it is equal to n+sod(n) for n = 253533036394 and 253533036403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1102757 + ... + 1312683.

It is an arithmetic number, because the mean of its divisors is an integer number (9027560025).

Almost surely, 2^253533036440 is an apocalyptic number.

253533036440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253533036440 is an abundant number, since it is smaller than the sum of its proper divisors (324230805160).

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

253533036440 is a wasteful number, since it uses less digits than its factorization.

253533036440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210324 (or 210320 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 38.

The spelling of 253533036440 in words is "two hundred fifty-three billion, five hundred thirty-three million, thirty-six thousand, four hundred forty".