253123140140 has 72 divisors (see below), whose sum is σ = 576101117088. Its totient is φ = 93378355200.

The previous prime is 253123140139. The next prime is 253123140163. The reversal of 253123140140 is 41041321352.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3864665 + ... + 3929615.

It is an arithmetic number, because the mean of its divisors is an integer number (8001404404).

Almost surely, 2^253123140140 is an apocalyptic number.

253123140140 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 253123140140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288050558544).

253123140140 is an abundant number, since it is smaller than the sum of its proper divisors (322977976948).

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

253123140140 is a wasteful number, since it uses less digits than its factorization.

253123140140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66139 (or 66124 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 253123140140 its reverse (41041321352), we get a palindrome (294164461492).

The spelling of 253123140140 in words is "two hundred fifty-three billion, one hundred twenty-three million, one hundred forty thousand, one hundred forty".