253340136240 has 160 divisors (see below), whose sum is σ = 789851589120. Its totient is φ = 67171534848.

The previous prime is 253340136227. The next prime is 253340136251. The reversal of 253340136240 is 42631043352.

It is a happy number.

It is a super-2 number, since 2×253340136240² (a number of 24 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 35532996 + ... + 35540124.

It is an arithmetic number, because the mean of its divisors is an integer number (4936572432).

Almost surely, 2^253340136240 is an apocalyptic number.

253340136240 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 253340136240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394925794560).

253340136240 is an abundant number, since it is smaller than the sum of its proper divisors (536511452880).

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

253340136240 is a wasteful number, since it uses less digits than its factorization.

253340136240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

Adding to 253340136240 its reverse (42631043352), we get a palindrome (295971179592).

The spelling of 253340136240 in words is "two hundred fifty-three billion, three hundred forty million, one hundred thirty-six thousand, two hundred forty".