253421477144 has 64 divisors (see below), whose sum is σ = 532915891200. Its totient is φ = 111963772800.

The previous prime is 253421477039. The next prime is 253421477201. The reversal of 253421477144 is 441774124352.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 253421477095 and 253421477104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3187427 + ... + 3265965.

It is an arithmetic number, because the mean of its divisors is an integer number (8326810800).

Almost surely, 2^253421477144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 253421477144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266457945600).

253421477144 is an abundant number, since it is smaller than the sum of its proper divisors (279494414056).

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

253421477144 is a wasteful number, since it uses less digits than its factorization.

253421477144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79584 (or 79580 counting only the distinct ones).

The product of its digits is 752640, while the sum is 44.

The spelling of 253421477144 in words is "two hundred fifty-three billion, four hundred twenty-one million, four hundred seventy-seven thousand, one hundred forty-four".